What Does Cylinder (CYL) and Axis Mean in an Eye Prescription?
When it comes to prescriptions, the cylinder (CYL) and axis values are particularly confusing for many people, especially when ordering contact lenses online. Understanding these values helps you grasp …
CYL in Eye Prescription: Does It Mean You Have Astigmatism?
Aug 5, 2025 · Wondering if CYL on your eye prescription means you have astigmatism? This quick guide breaks down what CYL means, why it matters, and what to do next.
Eye Prescriptions (Meaning of SPH, CYL, AXIS) - Vision Center
Oct 9, 2024 · Cylinder, abbreviated CYL and diopters in measurement, indicates the lens power you need for astigmatism correction. Astigmatism is an uneven curvature of the eye’s cornea or lens.
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What Is CYL in an Eyeglass Prescription? A Simple Explanation ...
Dec 3, 2025 · CYL stands for Cylinder, and it tells you whether you have astigmatism. If your prescription shows a number in the CYL column, it means the front surface of your eye has a slight …
How to Read an Eyeglasses Prescription - American Academy of ...
Apr 18, 2023 · What is the “cylinder (CYL)” number on my prescription? The cylinder number is how much astigmatism you have, if any. This is when part of the cornea has a different curve. Normally, …
What is Cylinder (CYL) in Eye Prescriptions: A Complete Guide
Jun 21, 2025 · CYL stands for "Cylinder," and it is a measurement used in eye prescriptions to correct irregularities in the shape of your cornea or lens. Unlike the SPH, which measures your overall …