What is an aphakic crescent?

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Study for the Disorders of the Lens Test. Improve your skills with flashcards and multiple choice questions. Each question features hints and detailed explanations. Prepare thoroughly for your exam!

Multiple Choice

What is an aphakic crescent?

Explanation:
Aphakia leaves a crescent-shaped gap in the iris region where the lens would normally sit. When the crystalline lens is removed (or displaced), there is no lens tissue occupying the posterior chamber behind the iris, so the peripheral iris and pupil margins reveal a distinct crescent-shaped space. This is the aphakic crescent: a visible indication of absence of the lens tissue, not due to corneal edema and not a ring formed by a displaced lens.

Aphakia leaves a crescent-shaped gap in the iris region where the lens would normally sit. When the crystalline lens is removed (or displaced), there is no lens tissue occupying the posterior chamber behind the iris, so the peripheral iris and pupil margins reveal a distinct crescent-shaped space. This is the aphakic crescent: a visible indication of absence of the lens tissue, not due to corneal edema and not a ring formed by a displaced lens.

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