Practice Quiz

Certified Ophthalmic Medical Technologist (COMT)

Category - COMT

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Diplopia within the central 20 degrees in the straight-ahead position represents what percent of loss of visual efficiency of one eye?

  1. 25%
  2. 50%
  3. 75%
  4. 100%
Explanation

Answer: D - Diplopia within the central 20 degrees in the straight-ahead position represents 100% percent of loss of visual efficiency of one eye.

Diplopia fields are assessed on the perimeter at 33 cm or on the tangent screen to identify the disability from the double vision. The reduction of visual effectiveness in regions beyond 20 degrees depends on the position of the gaze.

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