SAQ 353 – Ophthalmology – sudden painless vision loss and vitreous haemorrhage
Model Answer
Ophthalmology – sudden painless vision loss and vitreous haemorrhage.
a. Causes
Central retinal artery occlusion.
Central retinal vein occlusion.
Vitreous haemorrhage.
Retinal detachment.
TIA/stroke.
Temporal arteritis.
Optic neuritis.
b. Diagnosis
Vitreous haemorrhage.
c. Main cause
Proliferative diabetic retinopathy.
d. RAPD
Suggests retinal or optic nerve pathology.
The pupil constricts normally with consensual light response but not with direct light, giving apparent paradoxical dilation on swinging-flashlight testing.
Seen in CRAO, CRVO, retinal detachment, or stroke/TIA.
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