ABO NOCE Basic Opticianry

Category - Instrumentation

What does a millimeter lens sizer tool do?
  1. It measures the circumference of the lens
  2. It determines the blank size to use for the lab
  3. It determines the A and B measurements of the lens
Explanation
Answer: A - The millimeter lens sizer tool measures the circumference of the lens.

This measurement is necessary for the lab if ordering a replacement lens whose dimensions are not on file with the lab. This measurement must be precise so the lens will not be ordered too big or small.
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