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.
What does 2.25 mean for glasses?
For the nearsighted, the American Optometric Association (AOA) has determined the following levels of severity: If your number is between -0.25 and -2.00, you have mild nearsightedness. If your number is between -2.25 and -5.00, you have moderate nearsightedness.
What does SPH for cylinder mean?
astigmatism
What does DS mean for cylinder?
DS is short for “Diopter Sphere” and should only be seen in your CYL column. It means there is no CYL correction needed, or in other words, no astigmatism correction.2020-05-17
What does 1.25 mean for glasses?
For example, 1.25 is one and one-quarter diopters. Typically, the further away from zero, the stronger the prescription. For example, 3.50 means that more correction is needed in comparison to a 2.25. The plus and minus let you know if you are near or farsighted.2019-09-18
What does SPH DS mean for glasses?
diopters sphere
What is Cylinder on glasses prescription?
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.