Plus/Minus Cylinder Conversion Calculator | ODReference
Easily convert between plus and minus cylinder prescriptions with this optometry focused calculator for clinical use.
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 …
How to Read an Eyeglasses Prescription
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. …
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 …
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 …
Prescription Lenses Eyeglasses Guide: What Does the CYL Number …
Apr 11, 2025 · The CYL number in your prescription indicates the degree of astigmatism—the larger the number, the more significant the correction needed. The CYL value is typically …
What is CYL on eye prescription? - Banton Frameworks
Sep 18, 2024 · What does CYL mean on an eye prescription? CYL stands for Cylinder and refers to the dioptric strength required to correct astigmat i sm in either or both of your eyes.
CYL Definition & Meaning - Merriam-Webster
Oct 23, 2025 · “Cyl.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cyl. Accessed 23 Oct. 2025.
What Does Sphere, Cylinder and Axis Mean? - Pendleton Eye …
Cylinder (CYL) – This indicates the amount of lens power for astigmatism and represents the difference in the greatest and weakest powers of the eye, usually separated by 90 degrees.