**Core Concept**
Intraocular calcification in a child is a sign of a specific underlying condition that requires prompt diagnosis and treatment. This condition is often associated with congenital or genetic disorders.

**Why the Correct Answer is Right**
The correct answer is related to a condition called **Cockayne syndrome**, which is a rare genetic disorder characterized by intraocular calcification, among other systemic manifestations. This condition is caused by mutations in the ERCC6 or ERCC8 genes, which are involved in DNA repair mechanisms. The intraocular calcification in Cockayne syndrome is thought to be related to the abnormal accumulation of calcium salts in the lens and vitreous humor, leading to cataract formation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not accurate as it does not describe a specific condition associated with intraocular calcification in children. **Option B:** This option may be a distractor, but it does not specifically relate to intraocular calcification. **Option C:** This option is incorrect as it describes a condition that affects adults, not children.

**Clinical Pearl / High-Yield Fact**
Cockayne syndrome is a rare genetic disorder that should be considered in children presenting with intraocular calcification, along with other systemic manifestations such as growth failure, hearing loss, and developmental delay.

**Correct Answer: D. Cockayne syndrome**