Optic disc changes of retinitis pigmentosa:
**Core Concept**
Retinitis pigmentosa (RP) is a group of genetic disorders affecting the retina's ability to respond to light, leading to progressive vision loss. The **optic disc** is often involved, showing specific changes. **Retinal degeneration** is a hallmark of RP.
**Why the Correct Answer is Right**
The correct answer is related to the characteristic optic disc changes in retinitis pigmentosa, which include **optic disc pallor**. This is due to the degeneration of the retina and the resulting reduction in optic nerve function. The **retinal pigment epithelium** plays a crucial role in this process.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the optic disc changes in RP.
**Option B:** Similarly, this option is incorrect as it does not align with the characteristic findings in RP.
**Option D:** This option is also incorrect as it does not describe the typical optic disc changes associated with RP.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **optic disc pallor** is a common finding in retinitis pigmentosa, reflecting the underlying **retinal degeneration**. This is crucial for diagnosis and differentiation from other conditions.
**Correct Answer:** C. Optic disc pallor