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How Accurate Are Eye Prescriptions? [Solved]
When glasses are manufactured according to the prescription, there is a tolerance range of how far off the prescription can be from what is written. Generally accepted tolerance ranges are within 0.25D (diopters) of the prescription written for the sphere and the cylinder.18 May 2018
HOW TO READ YOUR PRESCRIPTION
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How Does That Hot Air Balloon Know Your Eye Power? | A Look Into
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