**Question:** Not a feature of Congenital glaucoma among the following

A. Corneal edema
B. Proptosis
C. Hypotony
D. Anisocoria

**Core Concept:** Congenital glaucoma is a group of disorders characterized by an abnormal increase in intraocular pressure (IOP) in infants and young children. It is a critical condition because elevated IOP can lead to optic nerve damage, visual impairment, and blindness if left untreated.

**Core Concept (cont'd):** The correct diagnosis of congenital glaucoma involves evaluating multiple factors such as age of onset, corneal edema, proptosis, hypotony, and anisocoria.

**Why the Correct Answer is Right:** The correct answer is "Hypotony" because hypotony is a condition characterized by abnormally low intraocular pressure. In the context of congenital glaucoma, an elevated IOP is expected, not low pressure. Hypotony is not a feature of congenital glaucoma, and thus not mentioned in the options.

**Why Each Wrong Option is Incorrect:**

A. **Corneal edema:** Corneal edema refers to swelling of the cornea, which can occur due to various causes. While corneal edema may be present in certain types of glaucoma (e.g., corneal edema can occur in Fuchs dystrophy), it is not exclusive to congenital glaucoma, making it incorrect as a defining feature.

B. **Proptosis:** Proptosis refers to the protrusion of the eyeball due to inflammation or tumor growth. While proptosis may be present in some cases of congenital glaucoma, it is not a defining feature that is exclusive to congenital glaucoma.

C. **Anisocoria:** Anisocoria refers to an unequal pupil size. While anisocoria can be present in certain cases of congenital glaucoma (e.g., due to autonomic nervous system dysfunction), it is not exclusive to congenital glaucoma, making it incorrect as a defining feature.

D. **Corneal edema:** As mentioned before, corneal edema can be present in Fuchs dystrophy but not exclusively in congenital glaucoma.

**Clinical Pearl:** Congenital glaucoma can present with various ocular symptoms like redness, photophobia, and reduced visual acuity, making it essential to consider the possibility of congenital glaucoma in infants and young children with these symptoms, regardless of the presence or absence of the mentioned features (corneal edema, proptosis, anisocoria, and hypotony).

**Core Concept (cont'd):** It is crucial to focus on the elevated IOP and characteristic corneal changes in congenital glaucoma, such as corneal edema and hypotony.

**Why Hypotony is not a feature of Congenital Glaucoma:** Hypotony refers to low intraocular pressure. Congenital glaucoma is characterized by elevated intraocular pressure, not