**Core Concept**
Cystoid macular edema (CME) is a condition characterized by the accumulation of fluid in the macula, leading to vision impairment. It is often associated with inflammation, retinal vein occlusion, or diabetic retinopathy.

**Why the Correct Answer is Right**
CME typically results from the breakdown of the blood-retinal barrier, allowing fluid and proteins to leak into the retinal tissue. This is commonly seen in conditions like uveitis, where chronic inflammation leads to the formation of cystoid spaces within the macula. The correct answer is associated with uveitis, which is a well-known cause of CME.

**Why Each Wrong Option is Incorrect**
**Option A:** Age-related macular degeneration (AMD) is a leading cause of vision loss in older adults, but it is not typically associated with CME. AMD involves the atrophy of retinal pigment epithelial cells and the accumulation of drusen.
**Option B:** Retinal detachment occurs when the retina separates from the underlying retinal pigment epithelium, leading to vision loss. While it can cause vision impairment, it is not directly associated with CME.
**Option C:** Diabetic retinopathy is a microvascular complication of diabetes that can lead to vision loss. However, it is more commonly associated with diabetic macular edema (DME) rather than CME.

**Clinical Pearl / High-Yield Fact**
Uveitis, a form of intraocular inflammation, is a significant risk factor for developing CME. Patients with uveitis should be closely monitored for signs of CME, such as blurred vision, metamorphopsia, or a sudden decrease in visual acuity.

**Correct Answer:** C. Diabetic retinopathy is not the correct answer, it was a distractor.