**Question:** Congenital Morgagnian cataract is a feature of:

**Core Concept:**
Morgagnian cataract is a type of congenital cataract characterized by the presence of calcium deposits within the lens. It is named after the Italian ophthalmologist, Giovanni Battista Morgagni, who first described it in 1761. Congenital cataracts are a group of disorders that affect the lens of the eye, leading to impaired vision or blindness if left untreated.

**Why the Correct Answer is Right:**
Congenital Morgagnian cataract is a specific type of congenital cataract characterized by calcium deposition within the lens. This type of cataract typically presents in early infancy and is characterized by a characteristic "salt and pepper" appearance on examination. The correct answer is **C** because Morgagnian cataract is a specific type of congenital cataract, and thus falls under the broader category of congenital cataracts.

**Why Each Wrong Option is Incorrect:**
A. This option is incorrect because it does not specifically refer to the Morgagnian type of congenital cataract.
B. This option is incorrect as it does not specifically describe the characteristic feature of calcium deposition in Morgagnian cataract.
D. This option is incorrect because it is a different type of congenital cataract, characterized by nuclear sclerosis, not calcium deposition.

**Clinical Pearl:**
Congenital cataracts can have various etiologies, including genetic disorders, infections, toxins, and certain medications. Early diagnosis and management are crucial to optimize visual outcomes in these patients. Morgagnian cataract, being a specific type of congenital cataract, should be suspected in infants presenting with bilateral, symmetrical, and rapidly progressive vision loss in the first few weeks of life. This clinical pearl highlights the importance of understanding different types of congenital cataracts and their specific features to make an accurate diagnosis and provide appropriate treatment.