WebMar 15, 2024 · Cylinder (or CYL) This value only applies to people who have astigmatism, a common problem with the curvature of the cornea in front of the pupil. The larger this number is, the more significant the level of astigmatism is. More significant astigmatism can mean a greater effect on your unassisted vision quality. Axis WebJun 26, 2024 · Specific parts of Rx: To expand on dr. Proffitt's answer, sph = sphere; if this is a negative number, the prescription is a myopic or nearsighted prescription and a positive number dictates a farsighted or hyperopic prescription. Cyl = cylinder or the amount or power of the astigmatism correction. Axis is the direction in which the astigmatism ...

What Do Astigmatism Measurements Mean? - American …

WebSep 9, 2014 · This is the abbreviation for the Latin term OculusUterque, which means “both eyes.” The values under the column “Sphere (SPH)” indicate the amount of lens power, measured in diopters (D), prescribed to correct your nearsightedness or farsightedness. Sphere, sometimes abbreviated as SPH, indicates the amount of lens power needed to correct nearsightedness or farsightedness. The term “sphere” refers to the fact that distance vision correction is spherical, or equal in all meridians of the eye. It is measured in diopters, the unit of measurement for the lens's … See more During an eye exam, your doctor will determine whether you need vision correction. They may mention that you have either of the following: 1. Astigmatism 2. Nearsightedness (myopia) 3. Farsightedness … See more You’ll typically find the abbreviates OD and OS on the left side of your prescription. These are abbreviations for the Latin terms oculus dexter and oculus sinister. Essentially, … See more Axis refers to the lens meridianwith no cylindrical power to correct astigmatism. The axis is labeled as a number from 1 to 180. If a prescription includes cylinder power, it must be followed by an axis. The axis value is often … See more Cylinder, abbreviated CYL, follows sphere power in your eyeglass prescription. It indicates the amount of lens power needed to correct astigmatism, measured in diopters. If this column is blank, it means you have no … See more porsche 944 cup felgen

Spherocylinder definition of spherocylinder by ... - Medical …

WebJun 25, 2024 · The term "cylinder" means that this lens power added to correct astigmatism is not spherical, but instead is shaped so one meridian has no added curvature, and the meridian perpendicular to this "no … Webspherocylinder: a combined spheric and cylindric lens, one surface being spheric, the other cylindric. Synonym(s): spherocylinder WebAug 18, 2024 · Cylinder power always follows sphere power in an eyeglass prescription. Axis – If an eyeglass prescription includes cylinder power, it also must include an axis value, which follows the CYL power. The axis indicates the angle (in degrees) between the two meridians of an astigmatic eye. The axis is defined with a number from 1 to 180. porsche 944 fiberglass body parts