This document provides an overview of pediatric neuro-ophthalmology and various conditions that can cause visual impairment or loss in children. It discusses cortical visual impairment, congenital optic nerve anomalies, swollen optic discs, brain tumour related visual loss, optic atrophy, pupil abnormalities, and ocular motor nerve palsies. Evaluation and management are outlined for many of the conditions. The seminar aims to review specific topics like optic nerve hypoplasia, morning glory disc anomaly, optic disc coloboma, intracranial hypertension, optic neuritis, and brainstem gliomas among others.
Role of imaging in glaucoma management gunjan chadha
Glaucoma is chronic progressive optic neuropathy in which structural damage( Optic Nerve Head and Retinal Nerve Fiber Layer) proceeds the functional deterioration( Visual Field loss).
Hence structural imaging plays an important role in early diagnosis and follow up of a patient of glaucoma
Role of imaging in glaucoma management gunjan chadha
Glaucoma is chronic progressive optic neuropathy in which structural damage( Optic Nerve Head and Retinal Nerve Fiber Layer) proceeds the functional deterioration( Visual Field loss).
Hence structural imaging plays an important role in early diagnosis and follow up of a patient of glaucoma
Congenital Glaucoma is one of the most common causes of irreversible childhood blindness. This presentation covers this topic in detail that can aid physicians in effective patient care.
PS: The slides in the preview look skewed, download the presentation to view the font used in Office 2012 and upwards.
This presentation describes the nature of amniotic membrane grafts, Indications, and limitations with presentation of two cases of corneal perforations treated with it as a self experience
Congenital Glaucoma is one of the most common causes of irreversible childhood blindness. This presentation covers this topic in detail that can aid physicians in effective patient care.
PS: The slides in the preview look skewed, download the presentation to view the font used in Office 2012 and upwards.
This presentation describes the nature of amniotic membrane grafts, Indications, and limitations with presentation of two cases of corneal perforations treated with it as a self experience
Rare Case Of Right Eye Persistent Fetal Vasculature With Left Eye Optic Nerve...Dr. Jagannath Boramani
Sayli Gavaskar - Jr.Resident, V H Karambelkar - Professor, D K Sindal - Professor, and HOD , Department of Ophthalmology KRISHNA INSTITUTE OF MEDICAL SCIENCES AND DEEMED UNIVERSITY, KARAD, MAHARASHTRA.
PDF Handout: D Maino: Visual Diagnosis and Care of the Patient with Special N...Dominick Maino
This is a copy of my handout of the lecture given in class today. (Copyright 2016). You may download and use this for any non-commercial educational purpose.
glaucoma and cataract.pdf, After the class the students will be able :
Explain the structures and function of eye.
Explain the age affect on vision.
Describe the definition , etiology, risk factors, pathophysiology, medical management, surgical management and Nursing management of Glaucoma.
Describe the definition , etiology, risk factors, pathophysiology, medical management, surgical management and Nursing management of cataract.
List down the health education for Glaucoma and cataract.
Leigh Syndrome is a fatal mitochondrial disease with variable ophthalmologic manifestations. Ptosis can be the initial sign in patients with this rare inherited neurometabolic disorder. Misdiagnosis of conditions including juvenile myasthenia gravis and congenital ptosis delay proper identification and palliative care. We present a noteworthy case of a 16-month-old girl with acquired progressive bilateral ptosis who was diagnosed with Leigh Syndrome after further work up suggested by our examination.
Altitudinal Visual Field Defect case study.
Altitudinal visual field defect (VFD), which involves the loss of visual sensation in the horizontal half of the visual field, is caused mainly by anterior ischemic optic neuropath
Retinal vasculitis refers to the inflammation of the retinal vessel resulting in evident clinical manifestations i.e. vascular sheathing, leakage and occlusion. This presentation covers the etiology, pathogenesis, clinical features, diagnosis and management of this spectrum of retinal disease.
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
2. THE PAEDIATRIC LOW VISION
PATIENT
1 in 1000 children has low vision
75 % learning in early years due to
vision
Vision impairment: Long term
consequences
Vital to diagnose: Scope of Vision
Restoration and Rehabilitation
Centers for Disease Control. NECH P No. 99-0444.
National
Center for Environmental Health, Centers for Disease
Control.
3.
4. 200,000 to 300,000 children with severe visual
impairment.
Only 15,000 in blind school.
Neuro-ophthalmological disease in around 35% of these.
Vision 2020 document, Government of India.
5. SCHEME OF THE SEMINAR
CORTICAL VISUAL IMPAIRMENT
CONGENITAL OPTIC NERVE
ANOMALIES
SWOLLEN OPTIC DISC
BRAIN TUMOUR RELATED
VISUAL LOSS
OPTIC DISC ATROPHY
PUPIL ABNORMALITIES
OCULAR MOTOR NERVE
PALSIES
OCULAR MYASTHENIA GRAVIS
NYSTAGMUS
PHACOMATOSIS
UNEXPLAINED VISUAL LOSS
MANAGEMENT OUTLINE
6. CORTICAL VISUAL
IMPAIRMENT
CVI is defined as
visual impairment
caused by damage
to the central
nervous system.
Most common
cause of bilateral
visual impairment in
the developed world
Associated with:
Prematurity and ROP
Causes:
Hypoxia/Ischemia
Perinatal strokes, defined as occurring between 28
weeks of gestation and 7 days of age, have an
estimated incidence of up to 1 in 4,000 live births.
Most common cause of CVI.
Congenital Brain Malformation
CNS Infection
Ventriculoperitoneal Shunt Block
Head Injury
Child Abuse
Metabolic Irregularity
7. PRESENTAT
ION
Brodsky MC, Fray KJ, Glasier CM. Perinatal cortical and subcortical visual loss: mechanisms of injury
and associated ophthalmologic signs. Ophthalmology. 2002;109:85–94.
8. CVI
DIAGNOSIS/PROGNOSIS/MANAGEM
ENT
Consider the four A’s of visual loss: Acuity,
Assimilation, Attention, and Apraxia.
Poor Visual Function, Lack of Eye Contact
Associated Neurological/Systemic Abnormality
Extensive Role of Neuroimaging (MRI, PET)
Poor Prognosis: depends on initiation of
treatment
Periventricular Leukomalacia (Sub-cortical) is
indicator of damage to optic radiation: Poor
Prognosis, Tonic Down gaze
PERIVENTRICULAR LEUKOMALACIA
9. DELAYED VISUAL
MATURATION
When a child fails to show
the expected visual function
for his age but does so
spontaneously after a period
of time.
These infants often have
straight eyes, no nystagmus,
and brisk pupillary
responses, but seem to
“look straight through” the
examiner.
TYPES:
Type 1: Isolated DVM
Type 2: DVM with associated
systemic disease, mental
retardation, or other
neurodevelopmental disorders
Type 3: DVM with ocular
disease, such as bilateral
cataracts, severe corneal
opacities, colobomas, retinal
dystrophy, optic nerve
hypoplasia, or albinism
Uemura Y, Oguchi Y, Katsumi O. Visual
developmental delay. Ophthalmic Paediatr
10. MANAGEM
ENT
Early diagnosis of CVI is vital
Management is multifocal and requires team
work
Often is patient specific rather than protocol
based
Often the prognosis is poor and visual
outcome is low, 50% will never see, associated
IQ defects, learning disabilityBrodsky MC. Pediatric Neuro-Ophthalmology. Third Edition. Springer. 2016.
11. CONGENITAL OPTIC NERVE
ABNORMALITIES
Optic Nerve Hypoplasia
Excavated Optic Disc
Anomalies
Optic Disc Coloboma
Morning Glory Disc Anomaly
Peripapillary Staphyloma
Optic Pit
Congenital Tilted Disc
Syndrome
Congenital Disc
Pigmentation
Bilateral optic disc anomalies: poor
vision and nystagmus in infancy
Unilateral optic disc anomalies:
preschool presentation with sensory
esotropia
CNS malformations are common in
patients with malformed optic discs,
need imaging
Color Vision Normal
Any unilateral structural abnormality
that reduces visual acuity in infancy
may lead to superimposed amblyopia
12. OPTIC NERVE
HYPOPLASIA
Most common optic
disc anomaly
Clinical Features:
Abnormally small
discs, double ring
sign, vessel
tortuosity
Confirmed on MRI
Systemic
Associations
Amblyopia
ManagementZekki et al, BJO,
13. SYSTEMIC ASSOCIATION:
• 13-34%: pituitary
abnormalities on imaging
like empty sella, ectopic
posterior pituitary,
nonvisualized infundibulum
and posterior pituitary.
• Hypopituitarism occurs in
75% of optic nerve
hypoplasia patients,
although the majority of the
patients have no pituitary
abnormalities on
neuroimaging.
• Additionally growth
hormone deficiency (70%),
hypothyroidism (43%);
DIAGNOSIS:
• Clinical, Imaging
• VER low amplitude, ERG: WNL
PROGNOSIS
• Developmental delay often occurs in
affected children.
• Developmental delay in 32% and
cerebral palsy in 13%
• Patients with bilateral ONH and
abnormal gray or white matter
development had a higher rate of
developmental delay (65%) than
those without abnormalities (35%).
Kaur, Savleen et al. “Optic Nerve Hypoplasia.” Oman
Journal of Ophthalmology 6.2 (2013): 77–82. PMC.
Web. 11 Feb. 2018.
17. PSEUDO
PAPILLEDEMA
Optic Disc Drusen
Anterior to the lamina cribrosa,
Lipofuscin
Buried drusen may present as
pseudo disc edema
Visual field defects have been
detected in 71%–87% of eyes with
visible disc drusen and in 21%–39% of
eyes with pseudopapilledema but no
visible drusen
Vascular occlusions have been
reported in patients with disc drusen
18. Other causes of Pseudo
papilledema:
Persistent Fetal
Vasculature
Bermeister’s papilla
Hypermetropic/Nano
ophthalmic eyes
Juxtapapillary Myelination
Hyaloid Traction
19. PAPILLEDEM
A
ICSOL first possibility of
raised ICP
Most common tumors
associated with childhood
papilledema are midbrain and
cerebellar glioma,
medulloblastoma, and
ependymoma.
Clinical Presentation:
Headaches, transient visual
20. IIH/
PSEUDOTUMOU
R CEREBRI
IIH is a condition characterized by
signs and symptoms of increased
intracranial pressure without
evidence of a mass lesion or
hydrocephalus
Dandy Criteria for Primary IIH:
Smith JL. Whence pseudotumor cerebri? J Clin
Neuroophthalmol.1985;5:55–6.
Johnston I, Hawke S, Halmagyi M, Teo C. The pseudotumor syndrome:
disorders of cerebrospinal fl uid circulation causing intracranial
hypertension without ventriculomegaly. Arch Neurol.1991;48:740–7.
21. IIH(PEDIATRICVSADULT)
No gender predisposition
Better response to steroids (80% remission)
Surgery is indicated in progressive visual loss (20%)
Brodsky MC. Pediatric Neuro-Ophthalmology. Third Edition. Springer. 2016.
23. OPTIC
NEURITIS
Paediatric Optic
Neuritis:
Bilateral
Optic Disc Swelling
Often Post Infectious
rather than MS
Pediatric MS accounts
for only 2%–5% of all
MS cases
Neurodiagnostic criteria for pediatric MS
include:
• Two or more non-encephalopathic
clinical CNS events that have presumed
inflammatory cause, separated by more
than 30 days and involving two or more
areas of the CNS.
• One non-encephalopathic episode
typical of MS, associatedwith MR findings
demonstrating dissemination in space
and dissemination in time.
• One prior episode of ADEM followed by
a nonencephalopathic attack, equal or
greater than three months after the initial
symptom onset of ADEM, associated with
new MR lesions and showing
Krupp LB, Tardieu M, Amato MP, et al. International Pediatric Multiple Sclerosis Study Group pediatric
multiple sclerosis and immune-mediated central nervous system demyelinating disorders: revisions to
the 2007 definitions. Mult Scler. 2013;19:1261–7.
24. DIAGNOSTIC
EVALUATION
Battery of
investigations to
rule out other
causes.
Neuroimaging is
essential. (MRI of
head and spine)
Cecocentral
scotomas and largeBrodsky MC. Pediatric Neuro-Ophthalmology. Third Edition. Springer. 2016.
25. TREATME
NT
No clear cut
guidelines
ONTT is used
currently
Steroids are the
mainstay of treatment
after excluding
infectious causes.
Immunomodulators
like azathioprine andBrodsky MC. Pediatric Neuro-Ophthalmology. Third Edition. Springer. 2016.
26. BRAIN TUMOUR RELATED
VISUAL LOSS
Primary brain tumors are the most common solid neoplasms
in children and are second only to leukemia in overall
frequency during childhood.
Pediatric intracranial tumors in general
• Headache (33%)
• Nausea and vomiting (32%)
• Poor coordination or abnormal gait (27%)
• Papilledema (13%)
Pediatric intracranial tumors (age <4 years)
• Macrocephaly (41%)
• Nausea and vomiting (30%)
• Irritability (24%)
• Lethargy (21%)
Wilne S, Collier J, Kennedy C, et al. Presentation of childhood CNS tumors: a systematic review and
meta-analysis. Lancet
Oncol. 2007;8:685–95.
27. VISUAL
PATHWAY
LESIONS
50% intracranial tumours
can present with ocular
findings
Associated Features:
nystagmus, ocular motor
dysfunction, reduced
visual acuity, visual field
deficits,
dyschromatopsia, an
afferent pupillary defect,
anisocoria, optic
atrophy, or papilledema.Wilne S, Collier J, Kennedy C, et al. Presentation of
childhood CNS tumors: a systematic review and
meta-analysis. Lancet
Oncol. 2007;8:685–95.
28. Suprasellar: Suprasellar tumors in
children include optic pathway
gliomas,
craniopharyngiomas,germinomas,
pituitary adenomas.
Supratentorial tumours:
Astrocytomas are the most
common supratentorial tumors in
childhood, constituting
approximately 30% of such
tumors.
Posterior Fossa Tumours:
Medulloblastoma : most common
malignant brain tumor of
childhood.
This embryonal tumors of the posterior
fossa comprises 40% of posterior fossa
tumors.
29. Brain Stem Tumours:
Brainstem gliomas
represent about 15% of
pediatric CNS tumors.
The mean age at diagnosis is
7–9 years, with no gender
predilection.
Most common seen are diffuse
gliomas (58-75%).
Brainstem tumors are
suggested by the triad of long
tract signs, cranial
neuropathies, and ataxia.
30. MANAGEMENT
Unlike adult tumors, extracranial
tumors rarely metastasize to the
intracranial compartment in
children.
However, seeding of certain brain
tumors in children occurs often
along the CSF pathways, causing
invasion of the leptomeninges.
Due to delay in diagnosis, brain
tumors in children may be long
standing, leading to more severe
and less reversible visual loss
Need extensive imaging (MRI,
Angiography, PET, MR
Spectroscopy)
Long-term survivors of childhood
cancer have a ten times greater
incidence of cerebrovascular disease.
Treatment is multimodal:
Chemotherapy
Surgery
Radiotherapy,
Long term follow-up
Post Radiation:
SMART: stroke-like migraine
attacks after radiation therapy
Moyamoya Disease: hazy like a
puff of cigarette smoke drifting
in the air,” is a descriptive name
applied to the angiographic
finding of an abnormal network
of collateral vessels at the base
of the brain in the region of theBrodsky MC. Pediatric Neuro-
Ophthalmology. Third Edition. Springer.
32. OPTIC
ATROPHY
Optic atrophy is a morphologic
sequel to a multitude of anterior
visual pathway insults that
culminate in the loss of retinal
ganglion cell axons.
Leading cause of severe visual
impairment among 2,527 Nordic
children, followed by retinopathy of
prematurity and amblyopia.
Etiology: Tumours
(29%), post
inflammatory
(meningitis, optic
neuritis) (17%),
trauma (11%),
undetermined (11%),
hereditary (9%),
perinatal disease (9%),
hydrocephalus (6%),
neurodegenerative
disease
(5%)
Repka MX, Miller NR. Optic atrophy in children. Am J Ophthalmol.
1988;106:191–3.
37. Depending of Localisation:
Relevant Imaging
CT, MRI, MRA
Ipsilateral Horner syndrome
(first order) and
contralateral superior
oblique palsy (fourth nerve
palsy) suggests a lesion of
the trochlear nucleus or its
fascicle in the brainstem
Ipsilateral Horner syndrome
(third order) and an
abducens paresis (sixth
nerve palsy) suggests a
lesion in the cavernous
sinus
Acute Painful Horner
Syndrome should be
presumed related to a
dissection of the Ipsilateral
internal carotid artery
39. OCULAR MOTOR
NERVE PALSIES
Oculomotor
Nerve
Trochlear Nerve
Abducens Nerve
Multiple Nerves
•Is there history of
trauma?
•Is there diurnal
variation?
•Is there history of
headache?
•Are there neurological
deficits?
•Is there history of
previous episode?
•Is there a head
40. 3RD NERVE
LESIONS
Causes:
Congenital palsy
(43%), trauma (20%),
infection and
inflammation(13%),
tumor (10%),
aneurysm (7%), and
ophthalmoplegic
migraine (7%)
Miller NR. Solitary Oculomotor nerve
palsy in childhood. Am J Ophthalmol.
1977;83:106–11.
42. MANAGEMENT OF 3RD
NERVE LESIONS
Treat the underlying cause
Look out for aneurysm of the PCA
Neuroimaging is vital
Goal is: Binocular alignment, Ptosis
correction, Amblyopia management
43. 4TH
NERVE
LESION
S 71.2% have
head tilt
opposite to
side of palsy
most common
isolated cranial
nerve palsy
and the most
common cause
of acquired
vertical
45. (1) Is there a
right or left
hypertropia in
primary
position?
(2) Does the
deviation
increase in right
gaze or left
gaze?
(3) Does it
increase with
head tilt to the
46. MANAGEMENT OF 4TH
NERVE LESIONS
The trochlear nerves are particularly vulnerable to closed
head trauma when there may be contre coup of the tectum
of the midbrain against the edge of the tentorium.
Management: Surgical
First choice of procedure: ipsilateral inferior oblique muscle
weakening
Second procedure: deviation is greater than 15 prism
diopters is either ipsilateral superior rectus recession, when
the vertical deviation is worse in up gaze, or contralateral
inferior rectus recession, when the deviation is worse in
down gaze.
47. 6TH NERVE
LESIONS
Clinical Features:
head turn toward the
side of the lesion
horizontally
incomitant esotropia
that increases in gaze
toward the affected
eye and decreases or
disappears in gaze
away from the
49. MANAGEMENT OF 6TH
NERVE LESIONS
Newborns: Observation 4 to 10 weeks
Older Infants/ Children: If after period of
fever/immunisation: Observation for 3 months
Extensive imaging, neurological and otolaryngologic
evaluation
The highest rates of spontaneous recovery have
been reported
in idiopathic (67%), infectious (50%), inflammatory
(90%),
and traumatic (33%–50%) cases.
Aroichane M, Repka MX. Outcome of sixth nerve palsy or paresis in young
children. J Pediatr Ophthalmol Strabismus 1995;32(3):152–156.
50. MULTIPLE
CRANIAL
NERVE
PALSIES
Difficult to manage
Prognosis depends on
presentation, degree of
nerve involvement and
time of intervention
Imaging is essential in
every case.
52. SACCADE INITIATION
FAILURE OR OCULAR
MOTOR APRAXIA
The term saccade initiation failure or
ocular motor apraxia is used to
specify impaired voluntary saccades
and variable deficit of fast-phase
saccades during vestibular or
optokinetic nystagmus.
Clinical Features: poor head control,
head thrusting fixation using VOR,
hypotonia, motor delay
Evaluation: VEP, Neuroimaging
53.
54. CHILDHOOD DORSAL MIDBRAIN
SYNDROME
Etiology: Pretectal lesions
Clinical Features:The
constellation of deficits are
(1) vertical gaze palsy, (2)
light–near dissociation of
the pupils, (3) eyelid
retraction (Collier’s sign),
(4) disturbance of vergence,
(5) fixation instability, and
(6) skew deviation.
Evaluation: Neuroimaging
Management: Treat the
cause
55. MYASTHENIA
GRAVIS
9.1 per 1 million total population
4.2% were between 0 and 9 years, 9.5% were between
9 and 19 years
Transient Neonatal
Familial Infantile
Congenital Myasthenia Syndromes
Autoimmune Myasthenia
The prognosis for survival, improvement, and
remission in a child with myasthenia gravis is better
than that in an adult.
Brodsky MC. Pediatric Neuro-Ophthalmology. Third Edition. Springer. 2016.
56. Diagnosis:
EMG/NCS
Blood Tests
Genetic Tests
Treatment:
Breathing Support
Nutritional Support
Medications
Thymectomy
IVIG
Plasmapheresis
• 2 years, 57 cases
• AChR antibodies: positive titers were found
in 67%
• Tensilon test: 47% of generalized cases and
in 39% of ocular cases and results were
abnormal in 88% and 100%, respectively.
• Nerve conduction studies: abnormal results
found in 65%
• Pyridostigmine: all demonstrated
improvement.
• 18 patients steroids, improvement 94%.
• 21 patients intravenous immunoglobulin
(IVIG), improvement in 81%.
• Ocular presentations, all were started on
pyridostigmine; improvement occurred in
88% patients.
62. Prognosis:
Cognitive disability is another
common problem in children
with NF1
Patients with NF1 have a life
expectancy of about 15 fewer
years less when compared with
the general population, with
malignancies (brain tumors and
malignant peripheral nerve
sheath tumors) and
cerebrovascular disease
contributing disproportionately
to mortality.
Treatment:
Carboplatin and Vincristine
used for glioma reduction.
Poor Prognosis: 32% of
patients showed
improvement, 28% worsen,
40 % no change
Recently Avastin has been
shown to decrease tumor
size.
Radiotherapy not useful,
leads to secondary
malignanciesFisher MJ, Loguidice M, Gutmann DH, et al. Visual outcomes in children with neurofi
bromatosis type 1-associated optic pathway glioma following chemotherapy: a multicenter
retrospective analysis. Neuro Oncol. 2012;14:790–7.
63. NF2:
NEUROFIBROMATO
SIS
Clinical Features: Bilateral
Vestibular Schwannoma,
cutaneous schwannomas, spinal
schwannomas, lack of Lisch
nodules (with rare exceptions),
fewer café au lait spots, and the
presence of juvenile-onset
cataracts, CHRPE, Collision
tumours
Imaging: MRI: Vestibular
Schwannoma, ON sheath
64. TRANSIENT, UNEXPLAINED AND
PSYCHOGENIC VISUAL LOSS
Some children have visual
disturbances that occur in
the absence of, or are out
of proportion to, their
objective ophthalmological
findings.
The most common cause of
episodic visual loss
disturbances in childhood
is migraine.
May occur at some point in
up to 15% of the
population.
Lipton RB, Stewart WF, Diamond S, Diamond ML, Reed M.
Prevalence and burden of migraine in the United States:
data
from the American Migraine Study II. Headache. 2001;41:
65. MIGRAI
NE
Clinical features: Blurred
vision, foggy vision,
flickering lights, colored
lights, zigzag lines, and a
heat-wave sensation.
Descriptions provided by
children tend to be more
picturesque:
“a star breaking into a million
pieces,” “heat waves,” “water
coming down a window,” “lines
coming down from the sky like
Investigation
s:
•MRI
•EEG
•PET
Treatment:
•For abortive phase:
Sumatriptan, Ketorlac,
Prochlorperazine
•For prophylaxis:
Amitriptyline,
Verapamil, Topiramate
•Biofeedback, Relaxation,
66. Vital to differentiate and refer to clinician.
Other diseases like coagulopathy, cardiac disease, infectious
mononucleosis, mental diseases like schizophrenia can also cause
transient visual disturbances.
67. UNEXPLAINEDVISUALLOSS PSYCOGENIC
VISUAL LOSSNon organic loss of vision, diagnosis of
exclusion
Good prognosis with psychiatric help.
Brodsky MC. Pediatric Neuro-Ophthalmology. Third Edition.
Springer. 2016.
68. MEDICAL
MANAGEMENT
• Appropriate refractive correction.
• Surgical intervention whenever required
• Appropriate glare control glasses.
• Prescription and training to use a low vision
device
• Binocular vision therapy.
• Patching therapy in cases of amblyopia
• Appropriate referral for other disability
• Prognosis for improvement should be
explained to the individual.
69. FUNCTIONAL
MANAGEMENT
• Emphasis on size, color, contrast, distance and
illumination of targets
• Choose toys /games keeping in mind the
developmental levels.
• Eye tracking exercise
• Peripheral awareness therapy
• Searching and scanning strategies
• Central or eccentric viewing strategies
• Visual reach activities.
• Office based vision stimulation therapy
• Support from special educators.
• Orientation and mobility instruction
70. EDUCATIONAL
MANAGEMENT
• Levels of lightening and sensitivity to glare
• Positioning of the individual
• Size of material
• Placement of material in optimal visual field
• Appropriate colors
• Brightness
• Need for clutter reduction
• Spacing of visual information
• Orientation and mobility in the environment
71. LOW VISION
AIDS
Principles of magnification at distance point
Magnification is calculated by the formula
M(t)=BVA/TA, BVA =Best Visual Acuity, TA=
Targeted Acuity
Distance vision =6/60 and Goal distance
acuity= 6/15 (as this acuity is required for
reading street signs, bus number and watching
television so 60/15 = 4x
The power ,size and contrast as more is the
power of telescope lesser will be the field of
72. Principles of magnification at near point:
Relative distance magnification: Moving
the object closer to the eye (shortening the
distance) causing a proportional
enlargement of the retinal image. eg.
Sitting in front of the television, holding a
book close while reading (most children
can easily do this) etc.
Relative size magnification: Enlarging the
physical size of an object, such as large
print rather than standard print. eg. Large
print books, writing large letters.
Angular magnification: Using an optical
system such as telescopes, magnifiers.
Electronic magnification: Enlargement of
Christine Dickinson. Low Vision
Principles and Practices.
Manchester: Butterworth
Heinemann; 2001.
Magnification; pp. 69-118
73. LogMAR visual acuity prior to the introduction of low
vision devices (LVDs) was 0.90 ± 0.05 for distance and
for near it was 0.61 ± 0.05.
After the intervention, the acuities improved significantly
for distance (0.2 ± 0.27; P < 0.0001) and near (0.42 ±
0.17; P = 0.001).
The most common reported difficulties were related to
their academic activities like copying from the blackboard
(80%), reading textbook at arm's length (77.2%), and
writing along a straight line (77.2%).
Absolute raw score of disability pre-LVD was 15.05
which improved to 7.58 post-LVD. An improvement in
functional vision post visual rehabilitation was especially
found in those activities related to their studying lifestyle