The document summarizes key aspects of eye anatomy and physiology. It describes the major structures of the eye, including the sclera, cornea, choroid, retina, ciliary bodies, iris, vitreous humor, aqueous humor, and canal of Schlemm. It then discusses the retina in more detail, explaining the visual receptors and neural pathways. Finally, it covers principles of optics, accommodation, pupillary reflexes, and other topics related to vision.
INTRODUCTIONThe clear fluid filling the space in front of the eyeball between lens and cornea.The aqueous humour supplies nutrition and removes waste from the clear structure in the anterior eye(cornea and lens)The balance between aqueous production and outflow determines the intraocular pressure.
INTRODUCTION
The clear fluid filling the space in front of the eyeball between lens and cornea.
The aqueous humour supplies nutrition and removes waste from the clear structure in the anterior eye(cornea and lens)
The balance between aqueous production and outflow determines the intraocular pressure.
INTRODUCTIONThe clear fluid filling the space in front of the eyeball between lens and cornea.The aqueous humour supplies nutrition and removes waste from the clear structure in the anterior eye(cornea and lens)The balance between aqueous production and outflow determines the intraocular pressure.
INTRODUCTION
The clear fluid filling the space in front of the eyeball between lens and cornea.
The aqueous humour supplies nutrition and removes waste from the clear structure in the anterior eye(cornea and lens)
The balance between aqueous production and outflow determines the intraocular pressure.
The retina is the internal layer of the eyeball , which is a thin membrane having a purplish red color in living subject. This is a presentation by Dr. Shah-Noor Hassan regarding ANATOMY OF RETINA
The visual pathway/visual system is the part of central nervous system which gives organisms the ability to process visual detail , as well as enabling the formation of several non-image photo response functions.
It detects interprets information from visible light to build a representation of the surrounding environment .
The visual system carries out a number of complex tasks , including the reception of light and the formation of monocular representations; the buildup of a nuclear binocular perception from a pair of two dimensional projections ; the identification and categorization of visual objects ; assessing distances to and between objects and guiding body movements in relation to the objects seen.
THIS POWER POINT PRESENTATION IS TO GIVE READERS AN OVERVIEW ON THE ANATOMY AND PHYSIOLOGY OF THE EYE: STRUCTURES, FUNCTIONS OF EACH PART OF THE EYE, AS WELL AS THE PHYSIOLOGY ON HOW THE IMAGE IS CAPTURED IN THE EYE AND TRANSLATED BY THE BRAIN IN ORDER TO HAVE THE MEANINGFUL VIEW OF THE IMAGE.
The retina is the internal layer of the eyeball , which is a thin membrane having a purplish red color in living subject. This is a presentation by Dr. Shah-Noor Hassan regarding ANATOMY OF RETINA
The visual pathway/visual system is the part of central nervous system which gives organisms the ability to process visual detail , as well as enabling the formation of several non-image photo response functions.
It detects interprets information from visible light to build a representation of the surrounding environment .
The visual system carries out a number of complex tasks , including the reception of light and the formation of monocular representations; the buildup of a nuclear binocular perception from a pair of two dimensional projections ; the identification and categorization of visual objects ; assessing distances to and between objects and guiding body movements in relation to the objects seen.
THIS POWER POINT PRESENTATION IS TO GIVE READERS AN OVERVIEW ON THE ANATOMY AND PHYSIOLOGY OF THE EYE: STRUCTURES, FUNCTIONS OF EACH PART OF THE EYE, AS WELL AS THE PHYSIOLOGY ON HOW THE IMAGE IS CAPTURED IN THE EYE AND TRANSLATED BY THE BRAIN IN ORDER TO HAVE THE MEANINGFUL VIEW OF THE IMAGE.
In anatomy, special senses are the senses that have organs specifically devoted to them such as vision, gustation, olfaction, audition, and equilibrioception. These senses have specialized organs that detect and process stimuli and send signals to the brain which lead to the perception of that stimulus.
This is a class based presentation presented on Lecture of Shaalakya Tantra guided by Dr. Sadhana Parajuli Mam, H.O.D, Ayurveda Campus & Teaching Hospital, Kirtipur, I.O.M, T.U
NVBDCP.pptx Nation vector borne disease control programSapna Thakur
NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
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
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
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!
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
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2. Anatomy of the eye
• 1- sclera: is the outer protective layer.
• 2- cornea : anterior , modified part of the sclera, light
rays enter through it.
• 3- choroid : deep to the sclera , rich in blood vessels.
• 4-retina : lines the post. Two thirds of the choroid ,
formed of neural tissue rich in receptors.
• 5- cilliary bodies : thickened anterior parts of the
choroid , contain circular & longitudinal muscle fibers ,
produce aqueos humor.
• 6-iris: pigmented , opaque , contains constrictors of the
pupil ( circular ) & dilators of the pupil ( radial ).
3. Anatomy of the eye
• 7- vitreous humor : a gelatinous substance
between the lens & retina.
• 8- aqueous humor : a clear liquid that
nourishes the cornea & lens.
• 9- canal of Schlemm : at the junction between
the iris & cornea , drains aqueous humor.
4.
5. Retina
• Extends anteriorly almost reaching the cilliary body.
• Contains visual receptors ( rods & cones) + bipolar ,
ganglion , horizontal & amacrine cells.
• Rods & cones are next to the choroid . They synapse
with bipolar cells .
• Bipolar cells synapse with ganglion cells.
• Amacrine cells connect the ganglion cells to each
other.
• Axons of the ganglion cells converge to form the optic
nerve.
• Optic disk : is the point where the optic nerve leaves
the eye & blood vessels enter. It is located 3mm
medial to & slightly above the posterior pole of the
globe.
6. Retina
• The optic disk is a blind spot , it doesn’t contain any
visual receptors.
• Macula lutea :
• is a yellowish area near the posterior pole. It marks the
location of the fovea centralis.
• Fovea centralis :
• a thin , rod-free , cone-packed area.
• Each cone synapses with a single bipolar cell , which in
turn synapses with a single ganglion cell.
• Contains NO blood vessels.
• Maximum visual acuity.
9. Neural pathways.
• Axons of ganglion cells pass caudally , converge & form
the optic nerve.
• The optic nerve passes to the optic tract & ultimately
reaching the lateral genicualte body of the thalamus.
• Fibers from each nasal (medial) hemiretina decussate
in the optic chiasm .
• Fibers from the temporal ( lateral) hemiretina do not
decussate.
• In the geniculate body , fibers from one nasal
hemiretina synapse with the temporal fibers of the
other retina to form the geniculocalacrine tract.
• The geniculoclacrine tract passes to the primary visual
receiving area of the occipital lobe ( broadman’s 17 )
10.
11. Receptors
• Each rod & cone is divided into :
1- an outer segment :
-made of modified cillia that form saccules & disks
.
- The saccules & disks contain photosensitive
compounds.
2- an inner segment :
-contains a nuclear region.
-rich in mitochondria.
3- a synaptic zone.
12. Receptors
• Rods have a thin , rod-like ( 27lf !) appearance
in the outer segment.
• Cones have thick inner segments & conical
outer segments ( 27lf marra thanya! )
• Rods predominate in the extrfoveal portions
of the retina.
13.
14. Duplicity theory
• Rods :
- are extremely sensitive to light ( low threshold of
stimulation )
- Are scotopic ( scoto = no light ) : they are used in
night vision.
- Are incapable of resolving details or colors.
• Cones :
• - have a much higher threshold , & much greater
acuity.
• Are photopic ( photo = light ) : used for light &
color vision.
15.
16. Principles of optics.
• Light rays are refracted when passing from
one medium to another due to the difference
in density.
• Parallel light rays striking a biconcave lens are
refracted to a point behind the lens , called
the principal focus.
17. Principles of optics
• Principle focal distance : is the distance between
the lens & principle focus.
• Biconcave lenses diverge light , biconvex ones
converge it.
• Diopters : are used to measure the refractive
power of a lens in meters
• They are the reciprocal of the principle focal
distance in meters.
• 1 Diopter = 1/ PFL
• The human eye has a refractive power of 6 m at
rest.
18. Principles of optics
• Diopteric power of the eye :
• Cornea = 40-45 D
• Lens = 15-20 D
• Accommodation +14 ( depending on age )
19. Accommodation.
• Is an active process that requires muscular
actions.
• At rest , objects closer than 6 m to the eye appear
blurred.
• This blurriness is diminished by accommodation.
• So accommodation is : the process by which the
curvature of the lens is increased in order to
focus on a near object.
• When looking at a near object , the cilliary
muscles contract , the distance between the
edges of the cilliary bodies decrease & the lens
ligaments relax . Thus , the lens becomes more
convex.
20. Accommodation
The elastic lens is
attached to the circular
cilary muscles by the
zonalus which is made
of inelastic fibres
When the cilary muscles
are relaxed, the zonalus
pulls tight and keeps the
lens flattened for distant
vision
When the cilary muscles
contract, it releases the
tension on the zonalus
and the elastic lens returns
to a more rounded shape
suitable for near vision
21. Near point
• Is the nearest point to the eye where an
object can be brought into clear focus by
accommodation.
• Recedes throughout life due to the gradual
hardening of the lens.
• This leads to presbyopia ( loss of lens elasticity
)
22. Near response
• Is a three-part response that consists of :
1- accommodation.
2- convergence of the visual axes.
3- pupillary constriction.
23. Pupillary reflexes.
• Pupillary light reflex :
When light is directed into the eye, its pupil
constricts.
• Consensual light reflex :
When light is directed into one eye, the pupil of
the other also constricts due to complicated
mechanisms.
• Pathway :
Retina ---- optic tract ---- superior colliculus ----
occulomotor nucleus ---- pupillary muscles.
24. Argyll – Robertson pupils
• Seen in some pathologies such as
neurosyphyllis .
• Characterized by loss of light reflex but not
accommodation reflex.