![]() Astigmatism is a very common condition and simply means your eye isn't perfectly round. In short, CYL means you have an astigmatism. This correction builds off the SPH correction we discussed above and is only present in a specific axis of the lens. ![]() These are all the basic elements that may appear on a glasses prescription, but for more details on how to read your prescription, keep going!Ĭylinder, or CYL, refers to a type of correction your eye needs in a certain direction, or axis. You'll see these on contact lens prescriptions. ![]()
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