How to Read Eyeglass Prescriptions: Decode Your Numbers and What They Mean
To read eyeglass prescriptions, start with the sphere measurement for lens power in diopters (D). A minus (-) indicates nearsightedness, and a plus (+) signals farsightedness. The right eye (OD) is listed first, followed by the left eye (OS). Also note cylinder, axis, and ADD numbers for any necessary corrections. The sphere measures the degree … Read more