How Do Contact Lens Prescriptions Work?
June 14th, 2010 | See the Top Answers to this Question Below
I have one box of contact lenses with -3.75, 8.6, 14.0 for my right eye, and another box of -4.00, 8.6, 14.0 for my left eye.
Is my -3.75 right eye more blind than my -4.00 left eye, or is my left eye more blind?
Which is the stronger prescription?
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The higher the negative number, the worse your vision. For instancec, -4.00 left is worse than -3.75 right. 8.6 and 14 just have to do with the curve and size of your eyeball.
Your right eye has the stronger of the two prescriptions (is "more blind"). Both near-sighted and far-sighted scripts are "more powerful" the futher they are from a plano (zero power) script.
The 8.6 is the base curve of your eye (how "round" it is) and the 14.0 is the diameter of the lens (how much of your eye it covers).
Neither has anything to do with the strength of the correction required for your prescription.