Axis numbers are measured in angle degrees in what range?

  1. 0 to 90
  2. 0 to 180
  3. 1 to 90
  4. 1 to 180
Explanation

Answer: D - Axis numbers are measured in angle degrees ranging from 1 to 180.

The axis number describes astigmatism in the eye. The axis is denoted by a number ranging from 1 to 180. This number indicates the direction in which the cylindrical power in the lens is positioned.

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