Practice Quiz

Certified Ophthalmic Medical Technologist (COMT)

Category - COMT

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True or False:

A minus lens, when moved toward the eye, gains perceived power.

  1. True
  2. False
Explanation

Answer: A

The distance from the front surface of the cornea to the back side of a lens that is mounted in a frame and being worn by the patient is called vertex distance. The greater the vertex distance, the more perceived plus power. Therefore, a minus lens moved closer to the eye gains perceived power.

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