How does the "axis" relate to the "cyl" value? Why are both "cyl" and "axis" important for correcting astigmatism?

You need to know what these mean if you want to know how to understand your eye prescription. ... Axis: This explains where the irregular curve that is affecting ... May 28, 2021 ... What does CYL (cylinder) mean in a prescription? CYL, or cylinder ... contact lenses are directly on your eyes. In other words, because ... What Does Sphere, Cylinder and Axis Mean? · Sphere (SPH) – The term “sphere” means that the correction for nearsightedness or farsightedness is spherical, equal ... When you enter your prescription during checkout, please select "Not Applicable" for all Cylinder and Axis fields, thank you. Please note you can also ... Jun 7, 2024 ... “Plano” is a term used in eye prescriptions to indicate that there is no refractive error in the spherical component of the lens prescription. The axis is the lens meridian that is 90 degrees away from the ... It does not contain certain information that is crucial to acontact lens prescription. Mar 20, 2025 ... CYL: CYL stands for cylinder. If you have astigmatism, you'll need a cylindrical rather than a spherical lens. That's just a technical way of ... Feb 21, 2004 ... Axis is part of your prescription, and tells an optometrist in which direction they must position any cylindrical power in your lenses that is ... Mar 16, 2021 ... An astigmatism cyl consists of one direction of the lens being stronger than the at 90 degrees from it. Some eye doctors use + cyls, while ... Reading your contact lens or eyeglass prescription is simple once you understand a few values and what they mean. With this knowledge, you can partner with ...