True about primary angle closure glaucoma –a) More common in femalesb) Shallow anterior chamber is a risk factorc) Deep anterior chamber is a risk factord) Shorter diameter of cornea is a predisposing factore) Common in myopes
**Core Concept**
Primary angle closure glaucoma (PACG) is a condition where the iris blocks the drainage angle of the eye, leading to increased intraocular pressure (IOP) and potential damage to the optic nerve. PACG is more common in certain demographic groups and is characterized by specific anatomical features.
**Why the Correct Answer is Right**
The correct answer, option B (abd), is correct because **PACG is indeed more common in females** (a), as they tend to have shallower anterior chambers due to their wider pelvic dimensions. A **shallow anterior chamber is a risk factor** (b) for PACG, as it increases the likelihood of the iris blocking the drainage angle. Additionally, **a shorter diameter of the cornea is a predisposing factor** (d), as it contributes to a shallower anterior chamber. Furthermore, **PACG is more common in hyperopes** (not myopes, which is the incorrect option), as they tend to have shallower anterior chambers due to their thinner corneas.
**Why Each Wrong Option is Incorrect**
**Option A:** This option suggests that deep anterior chamber is a risk factor, which is incorrect. A deep anterior chamber actually decreases the risk of PACG.
**Option C:** This option suggests that PACG is common in myopes, which is incorrect. As mentioned earlier, hyperopes are at higher risk.
**Option E:** This option is incorrect as it states that PACG is common in myopes, which is the opposite of the correct answer.
**Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that patients with a family history of glaucoma are at higher risk of developing PACG, especially if they have a shallow anterior chamber.
**Correct Answer:**
✓ Correct Answer: B. abd