ABO NOCE Basic Opticianry

Category - Instrumentation

What is a lens box used for?
  1. It is used with the trial sets of lenses the doctors use to determine a prescription
  2. It is used as a donation box for charity
  3. It is used as a measuring device for a lens' height and width
Explanation
Answer: C - The lens box is a measuring device for a lens' height and width.
The lens box has a grid in it; you place the lens in it and read the dimensions. The B measurement is the vertical height of the lens and the A measurement is the horizontal width of the lens.
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