Prescription confusion

Discussion in 'Glasses' started by yelruc2, Oct 2, 2021.

  1. yelruc2


    Oct 2, 2021
    Likes Received:
    Hi, I'm sure this is common newby question, but I'm a bit confused.

    I just had my eyes examined by a different optometrist than for my exam 18 months ago. The Dr. told me that my prescription had not changed much so I'm still debating whether to get new lenses yet or not.

    My question is: In comparing the the two prescriptions, they appear to be using different units. For example, the first doctor uses decimals to express Sphere, Cylinder and Add (-0.25, -1.5, +2.50). The second doctor uses whole numbers (Sphere 101, Cylinder -175, Add +295).

    Are these two different ways of expressing the same thing?

    Bruce in San Jose
    yelruc2, Oct 2, 2021
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