Practice Quiz

Ophthalmic Technician

Category - Lensometry and Spectacle Skills

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What is the probable age of the patient with this prescription?

Prescription: +0.75 +0.50 X 90 OU

+2.75 +0.50 X 90 OU
  1. 30 years
  2. 40 years
  3. 50 years
  4. 60 years
Explanation
Answer: C - 50 years.

Presbyopic near addition correction is always given according to the age, over and above the distance correction. The near add for a 50 year old is +2.00D. Hence, in the given example, the distance correction has +0.75 D sphere to which +2.00 D must be added to get the near correction (+2.75D). The cylinder remains the same.
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