Question
The clinical manifestations of the condition as “marked by a red arrow” in the picture below include all of the following except ?
A. Kayser-Fleischer ring.
B. Sunflower cataract.
C. Greenish discolouration of iris.
D. Deposition of golden plaque at the posterior pole of the retina.
Show Answer
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Correct Answer » C
Explanation
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Ans;C. Greenish discolouration of iris.
Chalcosis occurs when an intraocular copper-containing foreign body deposits copper in Descemet’s membrane, the anterior lens capsule, or other intraocular basement membranes. A sunflower cataract is a petal-shaped deposition of yellow or brown pigmentation in the lens capsule that radiates from the anterior axial pole of the lens to the equator.
Usually, the sunflower cataract causes no significant loss of visual acuity. However, intraocular foreign bodies containing almost pure copper (more than 90%) can cause a severe inflammatory reaction and intraocular necrosis.
Chalcosis
- It refers to the specific changes produced by the alloy of copper in the eye.
- Copper from the alloy are dissociated electrolytically and are deposited under the membranous structure of the eye.
Clinical manifestations of chalcosis includes:
- Kayser Fleischer rings: due to deposition of copper under peripheral parts of Descement’s membrane.
- Sunflower cataract: due to deposition of copper under the posterior capsule of the lens.
- Deposition of golden plaques at the posterior pole of retina which reflects the light with a metallic sheen.
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