What Does Sphere, Cylinder and Axis Mean?
If you’ve ever looked closely at your eye glass prescription, you’ve probably wondered what the numbers and terms mean. In order to be interpreted worldwide, eyeglass prescriptions are written in a standardized format with common notations. Notable terms include: Sphere (SPH) – The term “sphere” means that the correction for nearsightedness or farsightedness is spherical, equal […]
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