COT - Certified Ophthalmic Technician Exam

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When evaluating an A-scan waveform for accuracy, which of the following represents the ideal characteristics for the retinal spike?

A short, broad spike followed immediately by a series of smaller spikes. A tall, steeply rising spike that is perpendicular to the baseline. A spike that is less than 50% of the height of the anterior lens spike. A notched or double-peaked spike just before the orbital fat signals.

Correct Answer:

A tall, steeply rising spike that is perpendicular to the baseline.

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