SPH is an abbreviation of “sphere” which indicates the power of the lens your doctor is prescribing to correct your vision. If you’re nearsighted (myopia), the number will have a minus sign (-). If you’re farsighted (hyperopia), the number will have a plus sign (+). See more CYL is an abbreviation of “cylinder” which indicates the lens power your doctor is prescribing to correct your astigmatism. If there’s no number in … See more Axis is a number from 1 to 180. If your doctor has included cylinder power, there will also be an axis value to indicate positioning. Axis is measured in degrees and refers to where … See more Prism only appears on a low number of prescriptions. It’s used when your doctor feels that compensation for eye alignment is necessary. See more Add is used in multifocal lenses to indicate the additional magnifying power for the bottom part of the lens. See more WebDec 3, 2024 · Sphere (SPH) on your eyeglass prescription refers to the amount of lens that is needed to bring your vision back to normal. It is measured in diopters and suggests that you need a spherical correction …
How bad is my eye prescription? What the numbers mean …
WebApr 12, 2024 · OS is oculus sinister, or your left eye. PD means pupillary distance. Monocular PD is the distance from your pupil to the middle of your nose. Binocular PD is … WebAlong the left-hand side, you might see these abbreviations. Here is what those abbreviations mean: O.D.-This is oculus dexter, meaning right eye. O.S.-This is oculus sinister, meaning left eye. O.U.-This is oculus uterque, meaning both eyes. dr william renk rockford il
OD vs. OS: A guide to eye abbreviations - All About Vision
WebApr 5, 2024 · Astigmatism is measured in diopters. A perfect eye with no astigmatism has 0 diopters. Most people have between 0.5 to 0.75 diopters of astigmatism. People with a measurement of 1.5 or more typically need contacts or eyeglasses to have clear vision. Of the three numbers on your contacts or glasses prescription, the last two refer to … WebNov 1, 2024 · Ophthalmology 54 years experience Eyeglass powers: These are small numbers and probably means the vision of this person is good without glasses. The first … WebTo convert a multi-focal prescription for single vision reading glasses, simply combine the Add number and the Spherical number. For example, if the Add were +2.25 and the OD-Sph was -0.50, the new OD-Sph for reading … dr william resh dermatology