Question
A patient presented with a penetrating injury of metallic foreign body. The condition of the eye is shown in the picture below.In this condition the electrolytically dissociated ions of metal are ?
A. Deposited under the membraneous structures of the eye.
B. Combine with intracellular proteins and produce degenerative changes.
C. Produce irritative reaction at the local site.
D. All of the above.
Show Answer
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Correct Answer » A
Explanation
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Ans:A. Deposited under the membraneous structures of the eye.
The condition shown in the picture above represents Chalcosis (Sunflower Catacract and Kayser-Fleischer ring)
Some patient’s with Wilson’s disease will have copper deposition (chalcosis) in the lens. This is termed a “sunflower” cataract because of its appearance when fully developed. The copper deposits are in and beneath the lens capsule, usually on the anterior surface.
In chalcosis bulbi the electrolytically dissociated ions of copper are deposited under the membraneous structures of the eye.
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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