Hazel Contacts Lenses
Here are some information as reference when you go to choose contact lenses.
Firstly, the number that's listed will be measured in diopters, a term that refers to corrective lens strength. It will be preceded by a plus sign (+) if you're farsighted or a minus sign (-) if you're nearsighted.
Secondly, if you have astigmatism — when the cornea, or lens of the eye, has an irregular shape, causing blurry vision — your prescription will include two additional abbreviations. "CYL" is short for "cylindrical power," which decides how strong a cylindrical lens must be to correct your astigmatism. Additionally, the term "Axis" will show up on the prescription, referring to the way that the cylindrical lens needs to be tilted to correct the astigmatism.
Thirdly, if you don't need astigmatism correcting lenses, your eye doctor may write "DS," for "diopters sphere," meaning your eyes have a regular, spherical shape.
Sometimes, an eyeglass or contact prescription may include information labeled "ADD," which is short for "additional correction." This is where details about bifocals, multifocal lenses or progressive lenses would appear.
Some of the abbreviations that appear in prescriptions are the same, including "OD" for "oculus dexter" and "OS" for "oculus sinister." "OD" is the Latin term for the right eye and "OS" is the term for the left eye.
Eyeglass prescriptions and contact prescriptions often have the abbreviation "SPH" on them, which stands for "spherical correction." In some cases, they have "PWR" listed instead, which stands for "power." Both terms refer to the strength of the prescription.
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