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