29 primary angle closure glaucoma
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Transcript of 29 primary angle closure glaucoma
![Page 1: 29 primary angle closure glaucoma](https://reader036.fdocuments.us/reader036/viewer/2022091122/589a66d51a28abc3438b6b51/html5/thumbnails/1.jpg)
1. Pathogenesis
3. Intermittent
2. Classification
4. Acute congestive
PRIMARY ANGLE-CLOSURE GLAUCOMA
5. Post congestive
6. Chronic
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Anatomical predispositions
• Convex iris-lens diaphragm
• Shallow anterior chamber
• Narrow entrance to chamber angle
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Pupil block
• Increase in physiological pupil block
• Dilatation of pupil renders peripheral iris more flaccid• Increased pressure in posterior chamber causes iris bombe
• Angle obstructed by peripheral iris and rise in IOP
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1. Latent - asymptomatic
3. Acute
2. Subacute - intermittent angle closure
4. Chronic - ‘creeping or latent’ angle closure
• IOP may remain normal• May progress to subacute, acute or chronic angle closure
• May develop acute or chronic angle closure
• Congestive - sudden total angle closure• Postcongestive - follows acute attack
• Follows intermittent angle closure
5. Absolute
Classification
• No PL following acute attack
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Intermittent angle-closure glaucoma
• Treatment - bilateral YAG laser iridotomy
• Epithelial oedema and closed angle during attack
Signs Treatment
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Acute congestive angle-closure glaucoma
• Severe corneal oedema • Complete angle closure (Shaffer grade 0)
• Dilated, unreactive, vertically oval pupil
• Shallow anterior chamber
• Ciliary injection
Signs
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Treatment of Acute Congestive Angle-Closure Glaucoma
2. Hyperosmotic agents - if appropriate• Oral glycerol 1-1.5 g/kg of 50% solution in lemon juice• Intravenous mannitol 2g/kg of 20% solution
3. Topical therapy• Pilocarpine 2% to both eyes• Beta-blockers• Steroids
1. Acetazolamide 500 mg i.v.
4. YAG laser iridotomy• To both eyes when cornea is clear
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Signs of postcongestive angle-closure glaucoma
• Folds in Descemet membrane
• Stromal iris atrophy with spiral-like configuration
• Posterior synechiae • Fixed dilated pupil• Fine pigment on iris • Glaukomflecken
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Chronic angle-closure glaucoma
• Similar to POAG with cupping and field loss
• Easily missed unless routine gonioscopy performed
• Variable amount of angle closure
Signs