**Core Concept**
'Bull's eye' maculopathy is a characteristic retinal finding associated with certain systemic conditions, particularly those that involve lipid accumulation or retinal toxicity. It is characterized by a central area of retinal atrophy surrounded by a ring of retinal pigment epithelium atrophy, giving the appearance of a 'bull's eye'.

**Why the Correct Answer is Right**
The condition is often caused by chloroquine or hydroxychloroquine toxicity, which leads to the accumulation of toxic metabolites in the retina. This results in damage to the retinal pigment epithelium and photoreceptors, ultimately causing the characteristic 'bull's eye' appearance. The mechanism involves the inhibition of lysosomal enzyme function, leading to the accumulation of lipofuscin in the retinal pigment epithelium.

**Why Each Wrong Option is Incorrect**
* **Option A:** While certain infections can cause retinal inflammation, they are not typically associated with 'bull's eye' maculopathy.
* **Option B:** Age-related macular degeneration (AMD) can cause retinal atrophy, but it typically presents as geographic atrophy rather than 'bull's eye' maculopathy.
* **Option D:** Hypertensive retinopathy can cause retinal hemorrhages and vascular changes, but it is not typically associated with 'bull's eye' maculopathy.

**Clinical Pearl / High-Yield Fact**
Chloroquine and hydroxychloroquine toxicity can be prevented by regular screening for retinal toxicity, including annual ophthalmological examinations. The risk of toxicity is higher in patients with pre-existing retinal disease or those taking higher doses of the medication.

**Correct Answer:** C. Chloroquine or hydroxychloroquine toxicity.