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ABO NOCE Basic Opticianry

Category - Instrumentation

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What does a pupilometer measure?

The size of the pupils
The distance between the pupils
The height of the pupils
None of the above

Explanation

Answer: B - A pupilometer measures the distance between the pupils.

That distance is referred to as the PD measurement or pupillary distance. The measurement is needed to identify where the optical centers of each lens will be placed in the frame.

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ABO NOCE Basic Opticianry

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