ABO NOCE Basic Opticianry

Category - Ophthalmic Optics

Which of the following is not a type of trifocal made?
  1. 10 X 35
  2. 7 X 24
  3. 8 X 35
  4. These are all made
Explanation
Answer: B - There is no trifocal made that is a 7 X 24.

Although trifocals are phasing out, some patients still prefer them.
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