True about heterochromic uveitis –
**Core Concept**
Heterochromic uveitis, also known as **Fuchs heterochromic iridocyclitis**, is a rare form of uveitis characterized by chronic, low-grade inflammation of the iris and ciliary body. It is often associated with **heterochromia** of the iris, where there is a difference in color between the two irises or within the same iris.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology and clinical presentation of Fuchs heterochromic iridocyclitis. This condition is typically unilateral and chronic, with minimal symptoms despite the presence of inflammation. The **heterochromia** is due to atrophy of the iris pigment epithelium.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because the condition is not typically bilateral.
**Option B:** Incorrect as it does not accurately describe the condition.
**Option C:** Incorrect because the condition is not typically associated with significant pain or redness.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that Fuchs heterochromic iridocyclitis is often asymptomatic, despite the chronic inflammation, and may be discovered incidentally during a routine eye examination.
**Correct Answer:** D. Fuchs heterochromic iridocyclitis is a form of uveitis.