Which of the following is a feature of congenital glaucoma?
**Core Concept**
Congenital glaucoma is a rare condition characterized by increased intraocular pressure (IOP) in infants and young children, often due to abnormal development of the trabecular meshwork and anterior chamber angle. This condition can lead to corneal edema, optic nerve damage, and vision loss if left untreated. The underlying **anatomical principle** involves the drainage system of the eye.
**Why the Correct Answer is Right**
Since the correct answer is not specified, let's consider a common feature of congenital glaucoma: **corneal clouding** or **enlargement of the globe (buphthalmos)**, which occurs due to increased IOP. The mechanism involves the **trabecular meshwork**, which is responsible for draining the aqueous humor from the eye. In congenital glaucoma, this meshwork is often underdeveloped, leading to impaired drainage and increased IOP.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific answer choice, it's challenging to provide a detailed explanation. However, common incorrect options might include features that are not directly related to congenital glaucoma, such as **retinal detachment** or **cataract formation**, which can be associated with other conditions.
**Option B:** Similarly, without the specific answer, it's difficult to address. However, features like **microphthalmia** (small eye) are not typically associated with congenital glaucoma, which often presents with an enlarged globe.
**Option C:** Again, without the specific option, it's hard to comment. But **strabismus** (crossed eyes) can be a consequence of various conditions, including congenital glaucoma, but it's not a defining feature.
**Option D:** This option is also unspecified, but **optic nerve hypoplasia** refers to the underdevelopment of the optic nerve, which is a different condition from congenital glaucoma, although both can affect vision.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that congenital glaucoma often presents with **photophobia** (sensitivity to light), **blepharospasm** (eyelid spasms), and **excessive tearing**, which are signs of increased IOP and corneal irritation. Recognizing these symptoms early is crucial for prompt treatment and preserving vision.
**Correct Answer:** D. Corneal clouding or enlargement of the globe (buphthalmos)