post_graduateAngleClosureGlaucoma-CurrentConcepts

post_graduateAngleClosureGlaucoma-CurrentConcepts - Angle...

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September 24,2006 Dr Sanjay Shrivastava 1 Angle Closure Glaucoma Current Concepts Dr Sanjay Shrivastava Professor of Ophthalmology Regional Institute of Ophthalmology Gandhi Medical College, Bhopal
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September 24,2006 Dr Sanjay Shrivastava 2 Definition • Angle Closure Glaucomas are characterized by apposition of peripheral iris against trabecular meshwork, resulting in obstruction of aqueous outflow.
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September 24,2006 Dr Sanjay Shrivastava 3 • Primary Angle Closure Glaucoma term is used when mechanism of angle closure glaucoma is not felt to be associated with other ocular or systemic abnormalities or because the mechanisms are not well understood. In this condition pupillary block glaucoma, plateau iris and combined mechanism glaucoma have been included.
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September 24,2006 Dr Sanjay Shrivastava 4 • Secondary Angle Closure Glaucoma is associated with ocular or systemic abnormalities or due to apparent mechanism such as membrane contraction or space occupying lesions pushing iris forward to close angle.
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September 24,2006 Dr Sanjay Shrivastava 5 Epidemiology • Glaucoma is second leading cause of blindness world wide. It has been estimated that by 2010 there will be 60.5 million glaucoma affected people with approximately 26% with angle closure glaucoma. • Angle closure glaucoma is less common than chronic open angle glaucoma. • Angle closure glaucoma is common among Asians and Eskimos but uncommon among Africans and Caucasians
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September 24,2006 Dr Sanjay Shrivastava 6 Epidemiology • The precise ratio between the two has not been established. Reported figures from some of the western countries indicates incidence of angle closure glaucoma as 0.5% in general population and 2-3 % in >40 years age group. • Prevalence of 1.58% has been reported in rural south Indian population by Lingam & co-workers (2006)
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September 24,2006 Dr Sanjay Shrivastava 7 Epidemiology • West Bengal study has reported glaucoma in 2.63% cases in 1594 individuals >50 years examined. • Another study has estimated that ½ of 67 million people diagnosed with glaucoma has primary angle closure glaucoma. According to this study 6.7 million people globally are irreversibly blind due glaucoma.
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September 24,2006 Dr Sanjay Shrivastava 8 Stages of Glaucoma 1. Initiating events 2. Structural alterations 3. Functional alterations 4. Optic nerve damage 5. Visual loss
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September 24,2006 Dr Sanjay Shrivastava 9 Stages of Glaucoma Stages representing: * The series of events, leading to * Tissue changes, leading to * Physiologic changes, leading to * Axonal loss, leading to * Visual field loss (progressive)
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Dr Sanjay Shrivastava 10 Stages of Glaucoma * Stage I – Initiating events may be genetic or acquired * Stage II- Tissue changes are associated with aqueous outflow system with vascular and structural alteration in optic nerve head. * Stage III- Physiologic changes are associated
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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post_graduateAngleClosureGlaucoma-CurrentConcepts - Angle...

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