In primary congenital glaucoma (PCG), the cardinal triad at presentation includes all of the following EXCEPT:

• A Epiphora (excessive tearing)
• B Buphthalmos (enlarged globe)
• C Photophobia
• D Deep anterior chamber ✓

Explanation

The classic triad of PCG is epiphora, photophobia, and blepharospasm, all caused by corneal oedema and Haab striae. Buphthalmos (enlargement of the globe due to increased IOP in the elastic infantile eye) is a characteristic sign. The anterior chamber is characteristically SHALLOW in angle-closure; in PCG the trabecular obstruction causes raised IOP from birth, and the anterior chamber may be normal or deep relative to the enlarged eye — it is NOT a deep AC that distinguishes it. Shallow AC is a feature of secondary angle-closure, not PCG.

Reference: Khurana Comprehensive Ophthalmology, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.