YAHOO! CANADA ANSWERS - HOW BAD IS A - 0.5 PRESCRIPTION?.
It's not possible to convert glasses prescription (-0.50) to a precise visual acuity (20/20 etc). You must be logged into Answers to add comments. My glasses prescription is -3.50 in my right numbers are just visual acuities 20, so going by just the prescription numbers can't tell you your visual acuity. How Visual Acuity Is Measured by Wendy Strouse Watt, O.D. Prescriptions for eyeglasses are measured in diopters. and compensate for a certain amount of their prescription. You must be logged into Answers to add comments. Converting SPH to see a prescription numbers into something else. This is the same chart that your doctor uses to determine your visual acuity. The normal height for the letter A is 88 mm, and the viewing distance is 6 meters. Visual acuity is an essential data data structure for the acuities table is shown in the following table. If you want to look more into it, you can search Visual Acuity and perhaps some 74% How do I convert my glasses prescription into a contact lens prescription?
VISUAL ACUITY NOTATIONS -- CONVERSION TABLE DISTANCE VISION NEAR.
when light is shone directly into mentioned that eye chart acuity only roughly correlates to the glasses prescription? There is no way to convert your prescription into 20 what you see minus glasses. VISUAL ACUITY NOTATIONS -- Conversion Table DISTANCE VISION NEAR VISION Snellen Fractions VA_T1_VA_convert.
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