**Core Concept**
Haab's striae refer to a specific pattern of corneal scarring associated with increased intraocular pressure, particularly in children. This occurs due to the stretching and thinning of the cornea, leading to breaks in Descemet's membrane.

**Why the Correct Answer is Right**
Buphthalmos, also known as infantile or congenital glaucoma, is characterized by an abnormally high intraocular pressure in infants and young children. This increased pressure causes the cornea to stretch and thin, leading to the formation of Haab's striae. The breaks in Descemet's membrane result in the characteristic radial, linear scarring pattern observed in buphthalmos. The pathophysiology involves the disruption of the corneal endothelium and the subsequent deposition of collagen and other proteins in the stroma.

**Why Each Wrong Option is Incorrect**
**Option A:** Trachoma is an infectious disease caused by Chlamydia trachomatis, leading to chronic keratoconjunctivitis and potentially scarring. However, it does not typically cause Haab's striae.
**Option B:** Keratoglobus is a rare condition characterized by a thinning and globular protrusion of the cornea. While it can result in scarring, it is not associated with Haab's striae.
**Option C:** Keratoconus is a progressive thinning and conical protrusion of the cornea, often leading to irregular astigmatism and myopia. It does not typically cause Haab's striae.

**Clinical Pearl / High-Yield Fact**
Haab's striae are a classic sign of buphthalmos, and their presence should prompt a thorough evaluation for glaucoma in children. Early diagnosis and treatment of glaucoma can prevent vision loss and the development of these characteristic scarring patterns.

✓ Correct Answer: A. Buphthalmos