COT - Certified Ophthalmic Technician Exam

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During an A-scan measurement, the technician fails to identify a distinct posterior lens capsule spike, and the lens thickness value appears abnormally large. This is most characteristic of:

A patient who is aphakic. Misalignment onto the optic nerve head. A dense posterior subcapsular cataract. Excessive gain setting on the machine.

Correct Answer:

A dense posterior subcapsular cataract.

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