**Core Concept**
Persistent primary hyperplastic vitreous (PHPV) is a congenital anomaly characterized by the abnormal persistence of the primary vitreous in the eye, leading to retinal detachment, glaucoma, and vision loss. This condition is often associated with other systemic abnormalities and developmental disorders.

**Why the Correct Answer is Right**
PHPV is a result of the failure of the primary vitreous to regress during embryonic development. The primary vitreous is formed by the extension of the optic cup into the vitreous space, and its regression is essential for normal retinal development. In PHPV, the primary vitreous persists, causing traction on the retina and leading to its detachment. This condition is often associated with other congenital abnormalities, such as coloboma, microphthalmia, and developmental delays.

**Why Each Wrong Option is Incorrect**
**Option A:** **This option is incorrect because PHPV is not typically associated with a specific genetic disorder. While some cases may have a genetic component, the condition is often idiopathic.**
**Option B:** **This option is incorrect because PHPV is not a result of retinal detachment. While retinal detachment can occur in PHPV, it is a consequence of the condition, not a cause.**
**Option C:** **This option is incorrect because PHPV is not a type of retinal degeneration. Retinal degeneration refers to a group of conditions characterized by the progressive loss of retinal cells, whereas PHPV is a congenital anomaly of the primary vitreous.**

**Clinical Pearl / High-Yield Fact**
PHPV is often associated with other congenital anomalies, such as coloboma and microphthalmia, and may be part of a larger syndrome, such as ocular coloboma syndrome or microphthalmia syndrome.

**Correct Answer:** C.