**Core Concept**
Chalcosis is a copper toxicity disorder affecting the eyes, primarily due to chronic exposure to copper compounds. It manifests with characteristic ocular findings involving deposition of copper in the anterior segment and retina, particularly in the posterior pole and lens.

**Why the Correct Answer is Right**
Chalcosis presents with **Kayser-Fleischer rings** (greenish-brown pigmentation in the cornea due to copper deposition), **sunflower cataract** (golden, concentric opacities in the lens), and **golden plaques** at the posterior pole of the retina. These are all direct signs of copper accumulation. **Dalen-Fuchs nodules**, however, are not associated with chalcosis. Instead, they are **pigmentary deposits in the retina seen in retinitis pigmentosa**, a hereditary degenerative retinal disease, and are unrelated to copper toxicity.

**Why Each Wrong Option is Incorrect**
Option A: Kayser-Fleischer ring is a hallmark of Wilson’s disease, which involves copper accumulation and is a key feature of chalcosis.
Option B: Sun-flower cataract is a classic sign of chalcosis due to copper-induced lens opacities.
Option C: Golden plaques at the posterior pole result from copper deposition in retinal pigment epithelium, a defining feature of chalcosis.

**Clinical Pearl / High-Yield Fact**
Remember: **Kayser-Fleischer rings + sunflower cataract + golden plaques = chalcosis**. **Dalen-Fuchs nodules = retinitis pigmentosa**, not chalcosis. This distinction is crucial for differentiating metabolic disorders from degenerative retinal diseases.

✓ Correct Answer: D. Dalen- fuch's nodules.