This document discusses ectopia lentis, or displacement of the crystalline lens. It begins with an overview of ectopia lentis, including definitions and pathophysiology. Signs and symptoms include visual impairment, fluctuating vision, poor near vision, and visual field defects. Causes of ectopia lentis include trauma, genetic conditions like Marfan syndrome, and other systemic diseases. Evaluation involves assessing vision, external eye exam, imaging, and lab tests if a systemic condition is suspected. Treatment options include refractive correction, surgery like lensectomy, and low vision devices. Low vision management aims to improve distance and near vision through high-power lenses, telescopes, magnifiers and other optical and non-optical aids.
To know Humphrey visual field analyser
To know about various types of perimetry
To identify field defect
To recognize that field defect is due to glaucoma or neurological lesion
To know that field defect is progressive or not
Interpretation of HVFA
Maddox Rod
Use of Maddox Rod
Method of Assessment MR
Double MR Test procedure
Recording procedure of MR Test
Heterophoria, Cyclophoria, Esophoria,Exophoria,Hyperphoria,Hypophoria
To know Humphrey visual field analyser
To know about various types of perimetry
To identify field defect
To recognize that field defect is due to glaucoma or neurological lesion
To know that field defect is progressive or not
Interpretation of HVFA
Maddox Rod
Use of Maddox Rod
Method of Assessment MR
Double MR Test procedure
Recording procedure of MR Test
Heterophoria, Cyclophoria, Esophoria,Exophoria,Hyperphoria,Hypophoria
IOL implantation in the absence of capsular bagcrisnemato
Manejo de la ectopia lentis y de los implantes secundarios en ausencia de soporte capsular.
Comparativa entre las diferentes opciones quirúrgicas y protocolo de actuación.
This Presentation is about Lentil (Lens culinaris), also known as Massur, Masoor, Masura. This Presentation includes Introduction, Biological Classification, Morphology of Lentil Plant, Floral Biology, Origin, Cytology, Breeding Objectives, Breeding Procedures, Diseases and Insects damage the Lentil Crop,
complete information about the refractive errors due to the problem in the acomodation of eye lense , disturbed image formation in the retina, contains -types of disease condition .
That is, an inward squint that does not vary with the direction of gaze.
##Clinical_optometry #vision_care #eyecare #Eye_Awareness #optometry #eye #squint #Esotropia #eye_health #OSC #Ashith_Tripathi
This pdf describes the details of some pathological conditions with their treatment.
some conditions
Albinism,
Aniridia
Coloboma
Corneal dystrophies
Cataract
Dislocated lens
Diabetic retinopathy
Keratoconus
Macular hole
Glaucoma
Myopic degeneration
Nystagmus
Optic trophy
Retnial detachment
Retinopathy of prematurity
Retinitis pigmentosa
Stargardt's disease
diseases of eye may be related to a variety of systemic disorders. prompt management is important to prevent long term complictions. it includes diseases such as ROP, cataract, conjunctivitis, strabismus, refractive errors, retinoblastoma, congenital glaucoma, etc.
Similar to Ectopia lentis and its low vision management (20)
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
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.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
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!
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
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.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
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.
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.
1. ECTOPIA LENTIS
AND ITS LOW VISION MANAGMENT
Indra P Sharma
Master of Clinical Optometry (Year I)
Amity Medical School
2. Objective
To have a better understanding about ectopia
lentis with regard to its pathophysiology, etiology,
clinical manifestation and management.
To understand the management of ectopia lentis
with low vision aids
3. Contents
1. An overview
2. Signs and symptoms
3. Etiology of ectopia lentis
4. Workup and evaluation
5. Treatment
6. Low Vision Management
7. Conculsion
8. Reference
4. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
An Overview
5. Introduction
Ectopia lentis is defined as displacement or malposition
of the crystalline lens of the eye.
1749 - Berryat first reported case of lens dislocation
1856- Stellwag coined the term “ectopia lentis”
Ectopia lentis can be :
1. Subluxation
2. Luxation (dislocated)
Sharma IP
6. Subluxation
Condition when the
crystalline lens is
partially displaced but
contained within the
lens space.
Few zonular attachment
present
Sharma IP
7. Dislocation
Also known as luxated
When lens lies completely
outside the lens patellar
fossa, in the anterior
chamber, free-floating in
the vitreous, or directly on
the retina.
Sharma IP
8. Anatomy of zonules
The lens is suspended in its anatomic position by
ciliary zonules (zonules of Zinn or suspensory
ligament of Zinn)
Zonules fibers which run from ciliary body and
insert into the outer layer of the lens capsule
around the equator (1.5 mm anteriorly and 1mm
posterior)
Stronger zonules in anterior capsule
Each zonule measures 5 to 30μm in diameter
and is composed of bundles of microfibrils
Sharma IP
9. Pathophysiology
Underlying
pathophysiology -
Disruption or dysfunction of
the zonular fibers of the
lens, regardless of cause
(trauma or heritable
condition)
The degree of zonular
impairment determines the
degree of lens
Sharma IP
10. Epidemiology
Frequency
A rare condition.
Incidence in the general population is unknown.
Mortality/Morbidity
Can cause marked visual disturbance, depending the
degree of lens displacement and the underlying etiology
Sex
More common in males.
Age
At any age (At birth or it may manifest late in life)
Sharma IP
11. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Signs and Symptoms
Sharma IP
12. Symptoms
Distance visual acuity (moderate to severe impairment)
depending on position of lens
1. Fluctuating vision dramatically as the vision may alternate
between phakia and aphakic
2.Progressive movement of the lens- Extreme hyperopic shift or
myopic astigmatism
Poor near vision
Due to loss of accommodative power due to weakened,
stretched or broken zonules
Sharma IP
13. Contd...
Monocular diplopia
Visual field defects (Due to lens induced secondary
glaucoma)
A 1963 histological study found that crystalline lenses that
were
dislocated anteriorly were associated with glaucoma 77.2% of
the time and that crystalline lenses that were subluxed or
dislocated
Source: Sihota R Sood NN, Argarwal He. 1995. Traumatic glaucoma.Acta Ophthalmol Scand
posteriorly were associated with glaucoma 87.5% of the time.
73:252-254.
Sharma IP
14. Contd....
Painful red eye (secondary to trauma)
Glare and photophobia
Sharma IP
15. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Etiology of ectopia lentis
Sharma IP
16. Traumatic dislocation
Traumatic dislocation is most common cause of ectopia
lentis.
Sharma IP
17. Hereditary ectopia lentis without
systemic manifestations
Single (isolated) ectopia lentis
Autosomal dominant inheritance
Genetic defect located on chromosome
15, causing a dysfunctional zonular
apparatus.
Microspherophakia is common.
Present at birth, can even onset late
Typically, supertemporal displacement
Sharma IP
18. Ectopia lentis et pupillae
Usually is bilateral and typically autosomal
recessive.
characterized by asymmetric eccentric pupils
that are displaced in the opposite direction of
the lens dislocation (toward the most
dysfunctional zonular fibers).
The irides often appear atrophic with
transillumination defects
Cataracts (common)
Sharma IP
19. Pupil may be displaced in opposite
Single (isolated) ectopia lentis direction (ectopia lentis et pupillae)
Sharma IP
20. Systemic conditions associated
with ectopia lentis
Marfan syndrome (most frequent cause of
hereditary ectopia lentis)
Homocystinuria (second most common cause of
hereditary ectopia lentis)
Weil-Marchesani syndrome
Sulfite oxidase
Hyperlysinemia
Sharma IP
21. Marfan syndrome
Transmitted as an autosomal dominant
trait
Prevalence: approx. 5 per 100,000.
Mutations involving the fibrillin gene on
chromosomes 15 and 21 and may relate
to incompetent zonular fibers.
Sharma IP
22. Systemic association of
Marfan
• Limb-trunk
• disproportion
• Arachnodactyly
• Pectus excavatum
• High-arched palate
• Aortic dilatation,
dissection and
regurgitation
• Mitral valve prolapse
Sharma IP
23. Ocular manifestation
Superio-temporal
dislocation of a lens in 80%
of cases
Zonules usually intact
Blue sclera
Sharma IP
24. Contd..
Axial myopia Lattice degeneration
Cornea plana
Angle anomaly and
glaucoma
Sharma IP
25. Homocystinuria
It is an inborn error of metabolism.
Most often caused by a deficiency of
cystathionine b-synthetase (the enzyme
that converts homocysteine to
cystathionine).
Sharma IP
26. Systemic and ocular
manifestation
Malar flush and fine fair hair
Marfanoid habaitus
Increased platelet stickiness
Mental retardation-50%
Inferonasal lens
subluxation -90%
Disintegretation of
zonules Sharma IP
27. Weil-Marchesani Syndrome
Rare syndrome characterized by skeletal
malformations
The inheritance pattern is not well
understood.
Pupillary block glaucoma is common;
therefore, prophylactic laser peripheral
iridotomies are recommended.
Sharma IP
28. Systemic and ocular
manifestation
Short stature
Short stubby fingers
(brachydactyly)
Mental handicap
Microspherophakia (most
common)
Anterior lens subluxation
(usually)
Sharma IP
29. Sulfite oxidase deficiency
Extremely rare disorder caused by a
defect in sulfur metabolism.
Salient features are:
Progressive CNS abnormalities that
develop within the first year of life
Ectopia lentis.
Sharma IP
30. Hyperlysinemia
Extremely rare autosomal recessive
enzymatic defect of amino acid
metabolism
Salient features:
Mental retardation and lens dislocation.
Diagnosis is made by demonstration of
increased plasma levels of lysine.
Sharma IP
33. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Workup and evaluation
Sharma IP
34. Detailed history
History of ocular trauma.
History investigating possible systemic disease
associations.
Cardiovascular disease in Marfan syndrome
Skeletal problems in Marfan syndrome,Weil-Marchesani
syndrome or homocystinuria
Pertinent family history
Consanguinity
Mental retardation
Unexplained deaths at young age
Sharma IP
35. Ophthalmic evaluation
Visual acuity
Amblyopia is a common cause of decreased
vision in congenital ectopia lentis.
External ocular examination
Orbital anatomy for hereditary malformations
(eg, enophthalmos with facial myopathic
appearance seen in Marfan syndrome).
Measure corneal diameter (megalocornea in
Marfan syndrome).
Strabismus is common (secondary to amblyopia).
Sharma IP
36. Contd..
Retinoscopy and and keratometry
Careful retinoscopy and refraction is essential, often
revealing myopia with astigmatism.
Keratometry may help ascertain degree of corneal
astigmatism.
Slit lamp examination
Evaluate lens position, and identify phacodonesis or
cataract.
Measure intraocular pressure.
Dilated fundus examination
To rule out retinal detachment
Sharma IP
37. Laboratory studies
Perform appropriate diagnostic and laboratory
evaluation, if a hereditary condition is suspected
Cardiac evaluation for Marfan syndrome
Check serum and urine levels of homocysteine
or methionine for homocystinuria.
Sharma IP
38. Imaging studies
A scan
Axial length measurement may be of benefit
(patients with Marfan syndrome have large
globes)
B scan
For any other associated vitrous and retinal
complications
Sharma IP
39. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Treatment
Sharma IP
40. Refractive management
The key to managing lens subluxation optically is
to
perform two refractions:
1.For that portion of the pupil covered by the
crystalline lens (myopic astigmatism zone) and
2. For that portion of the pupil not covered by
the crystalline lens (highly hyperopic zone).
Sharma IP
41. Contd...
For moderate to severe subluxation
Option: An aphakic prescription with bifocals
and a pharmacologic dilation
For lens is subluxed out of the visual axis
(bilateral) Best option: An aphakic prescription
Both spectacle and contact lens may be
helpful.
Sharma IP
42. Medical management
If no, history of trauma, patients may
possess a systemic disease with potentially
deleterious effects; therefore,
comanagement with pediatrician or internist
is essential.
Dietary restriction: partially effective in
homocystinuria.
Sharma IP
43. Contd...
Treatment of glaucoma is dependent on the
etiologic mechanism.
Pupillary block requires laser peripheral iridotomy
or iridectomy and raised IOP treated medically.
Prophylactic laser iridotomy in microspherophakia.
Dislodged lens into the AC is initially
pharmacological (mydriasis/cycloplegia) in
conjunction with ocular massage through a closed
lid.
Treatment of a dislocated lens in the vitreous is
Sharma IP surgical.
44. Sugical treatment
1.Nd:YAG laser zonulysis
to displace lens out of visual axis
2.Lesectomy
Lensectomy is technically challenging and are indication in the
following:
Lens in the anterior chamber
Lens-induced uveitis
Lens-induced glaucoma
Lenticular opacity with poor visual function
Anisometropia or refractive error not amenable to optical
correction (eg, in a child to prevent amblyopia)
Impending dislocation of the lens
Sharma IP
45. Prevention and prognsis
Deterrence/Prevention
Early diagnosis of ectopia lentis with appropriate optical
correction can prevent amblyopia.
Complications
The most common ocular complications include
amblyopia, uveitis, glaucoma, and retinal detachment
Prognosis
Depending on the degree of lens dislocation, the age of
onset, and its associated secondary complications, most
patients do well.
Trauma-associated ectopia lentis – poor visual
prognosis
Sharma IP
46. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Low vision management
Sharma IP
47. Rule of thumb
Provide LVA to help releive the main
symptoms first
Sharma IP
48. Distance viewing devices
Why do we need it?
To compensate for high hypermetropia or
myopic astigmatism
Sharma IP
49. High power lenses
High plus spectacle
(aspheric lenses)
Aphakic contact
lens
(Silsoft/silsoft super plus)
Sharma IP
50. Roving Ring Scotoma
Circular restriction in the peripheral VF due to
prismatic effect of high plus lenses.
Aspheric lenses
reduces this scotoma
Sharma IP
53. Near optical devices
Why is it required?
To compensate for high hyperopia and loss of
accommodation
Preferable near viewing devices
1. Spectacle-mounted Reading Lenses
2. Telemicroscopes
3. Magnifiers
4. Electronic Devices- CCTV
Sharma IP
58. Visual field enhancing
devices
Reverse telescope
To compensate for VF
defects due to secondary
Glaucoma.
Prisms
Mirrors
Reverse Telescope
system
Sharma IP
59. Non-optical aids
Relative size and larger assistive devices
Glare, contrast, and lighting control
devices
Handwriting and written communication
devices
Medical management devices
Orientation and mobility management
techniques and devices
Sharma IP
60. Relative size and larger assistive
devices
Large print
Books, magazines, newspaper, dictionaries, thesauri,
atlas, cookbooks, encyclopedias, bibles
Photocopy machines ( e.g. A4 size to A3 size)
Computer with large prints font
Computer software program
Large print typewriters
Others
Telephone dial, bank checks, watches, clocks, calculators etc
Games like cross word puzzles, playing cards, chess
checkers, bingo etc.
Sharma IP
61. Magic 8.0 Large print
telephones
Sharma IP
69. Hand writing and written
communication
Signature guide
Check guides
Reading guide
Large prints
Bold felt-tip pens
Bold line paper
Large print typewriters
Sharma IP
70. Medical management devices
Monitoring blood glucose
Large print syringe
Syringe with magnifiers ( optical device)
Preset dosage
Pre-filled syringes- filled with clicking sounds
Monitoring blood pressure
Readout sphygmomanometers for hearing problems
Monitoring temperatures
Large readout thermometers and talking thermometer
Sharma IP
72. Counselling
If a hereditary condition is discovered,
appropriate genetic counseling recommended.
All relatives with potential risk should be
examined.
Advised against playing contact sports or doing
physically strenous activities.
Sharma IP
73. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference
Conclusion
Sharma IP
74. Take home message
Managing patients with ectopia lentis including
refraction is usually difficult and needs
expertise to manage them well.
As most patients with ectopia lentis are
syndromic, co-management with other
specialist is essential.
While managing patient with low vision we
need to looks at various cause and other
ocular association like glaucoma, retinal
detachment and amblyopia.
An optometrist needs to understand the need
of the patient and prescribe according.
Sharma IP
75. An overview
Signs and
Symptoms
Etiology of
ectopia lentis
Workup and
evaluation
Treatment
Low Vision
Management
Conculsion
Reference Reference
Sharma IP
76. Reference
Books
Jonathan A Jackson, Low Vision Mannual,2007, Butterworth
Heineman Elsevier.
William J Benjamin,2006, Borish’s Clinical Refraction,
Butterworth Heineman Elsevier. 20: 816-829
Lighthouse International, The Lighthouse Clinician’s Guide
to Low Vision Practice
Brilliant Richard L, 1999, Essentials of Low vision Practice,
Butterworth Heineman Elsevier. 6.8.9.10
Websites
www.emedicine.medscape.com
www.rootatlas.com
en.wikipedia.org
www.google.com/imghp
Sharma IP
Frequency
Ectopia lentis is a rare condition. Incidence in the general population is unknown. The most common cause of ectopia lentis is trauma.
Mortality/Morbidity
Ectopia lentis may cause marked visual disturbance, depending the degree of lens displacement and the underlying etiologic abnormality.
Sex
Males appear more prone to ocular trauma than females; therefore, a male preponderance has been reported. Male and female frequency varies with the etiology of the lens displacement.
Age
Ectopia lentis can occur at any age. It may be present at birth, or it may manifest late in life.