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Angle closure glaucoma secondary to hemiretinal vein occlusion

Editor,—Central retinal vein occlusion (CRVO) has been reported to cause shallowing of the anterior chamber with acute angle closure glaucoma.1 2 This is due to anterior displacement of the lens-iris diaphragm caused by either the transudation of fluid from retinal vessels into the vitreous cavity or swelling of the ciliary body due to spasm, oedema, or detachment which may cause relaxation of lens zonules with subsequent crowding and closure of the angle.2 3 We describe a patient who developed angle closure glaucoma without neovascularisation of the angle secondary to hemiretinal vein occlusion which responded to miotics and iridotomy suggesting a “pupillary block” mechanism. This is the first report of angle closure glaucoma following a hemiretinal vein occlusion.

### CASE REPORT

A 63 year old African American man with controlled systemic hypertension noted reduced vision in his right eye for 1 month. Best corrected visual acuity was 20/200 right eye with +1.75 −0.75 × 85, and 20/25 left eye with +2.25 −1.00 × 95. Slit lamp examination was unremarkable, pupils were equally reactive without an afferent pupillary defect. Intraocular pressure (IOP) was 26 mm …