Shining a light onto the iris from the lateral side could cause a crescent-shaped shadow on the medial side if the patient is suffering from:
A) hemianopsia.
B) glaucoma.
C) retinal artery occlusion.
D) anisocoria.

Question

Quizplus · Accepted Answer

Shining a light onto the iris from the lateral side and observing a crescent-shaped shadow on the medial side is indicative of a narrow anterior chamber angle, which is a common sign of angle-closure glaucoma. This shadow is caused by the light being blocked by the iris, which protrudes forward due to the increased pressure in the eye, a characteristic of glaucoma.

Shining a Light onto the Iris from the Lateral Side