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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.

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.

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 …

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, …

Sphere (SPH) and Cylinder (CYL) always have a (+) or (-) sign. On any prescription, PD can be written in different ways: e.g., 62 (Single PD), 33/31 (Dual PD), or 62/60 (Distance PD/Near PD).

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 …

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 …

Dec 4, 2025 · “Cyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cyl. Accessed 4 Dec. 2025.

Aug 29, 2024 · Cylinder (CYL) in an eye prescription refers to the amount of lens power needed to correct astigmatism. Astigmatism is a refractive error caused by an irregularly shaped cornea or lens.