Ophthalmic Assistant

Category - Visual Assessment

Vertex distance can be measured with a
  1. cross cylinder.
  2. PAM.
  3. distometer.
  4. pinhole disc.
Explanation
Answer: C - distometer.

Vertex distance can be measured with a distometer. The vertex distance is the distance from the cornea of the patient’s eye to the lens inserted in the trial frame, refractor, or glasses.
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