Description

This article is from the Vision and Eye Care FAQ, by grants@research.canon.com.au (Grant Sayer) with numerous contributions by others.

2.2 Why the difference between the way Optometrists and Ophthalmologists write the prescription ?

There are two ways of writing the prescription; referred to as "plus-cyl"
form or "minus-cyl" form. The plus cyl form, sometimes used by
Ophthalmologists is written

            +1.50 D
         ---------------
           +0.50 x  35

The equivalent minus cyl form, generally used by optometrists is written

            +2.00 D
        ---------------
          -0.50 x 125

 

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• prev: 2.1 How to read a glasses prescription
• Index
• next: 2.3 How to convert between the two forms

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health, vision, eye care, contact lenses, spectacles, eyecare, prescriptions, sunglasses, surgery