Anisocoria in untreated unilateral open-angle glaucoma

Area of Science:

• Ophthalmology
• Neuroscience

Background:

• Open-angle glaucoma is a leading cause of irreversible blindness.
• Pupil abnormalities can indicate neurological or ocular conditions.

Purpose of the Study:

• To investigate pupil size differences in patients with unilateral open-angle glaucoma.

Main Methods:

• Assessed pupil areas in 20 consecutive untreated unilateral open-angle glaucoma cases using planimetry.
• Compared pupil sizes between glaucomatous and fellow eyes.
• Visually assessed anisocoria from photographs.

Main Results:

• The pupil in the glaucomatous eye was consistently smaller than in the fellow eye.
• Pupil area differences ranged from 0.4% to 40.2%.
• Anisocoria was detected visually in 65% of cases, with no correlation to glaucoma severity.

Conclusions:

• A smaller pupil in the glaucomatous eye is a consistent finding in unilateral open-angle glaucoma.
• The underlying cause remains unclear but may involve ciliary nerve degeneration.
• Further research is needed to elucidate the mechanism of glaucoma-associated anisocoria.