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We know these as the instructions for making your glasses, but what do they actually mean? Here’s a quick summary: Which numbers are my right eye and which are my left eye on my prescription? In a typical prescription, two acronyms—one for each eye—are listed: O.D. This is short for oculus dexter, and is your right eye; O.S. This is short ...
The abbreviations and numbers on your eyeglass prescription describe the type and strength of lenses you need, and the degree of nearsightedness, farsightedness, or astigmatism in each of your...
Learn how to read and understand the letters, numbers and symbols on your eyeglasses prescription. Discover why contact lens prescriptions differ from eyeglass prescriptions, and what all those numbers mean.
Your eyeglasses prescription may include Latin abbreviations, numbers, and mathematical signs. These numbers are used to describe the correction you need in your glasses. A plus sign next to the number means you are farsighted, while a minus sign means nearsightedness.
The Sphere (SPH) number on your prescription represents the amount of lens power needed to correct your vision, specifically for nearsightedness or farsightedness. A positive (+) number means you are farsighted (hyperopia), and a negative (-) number indicates you are nearsighted (myopia).
An eye prescription specifies the values needed for your corrective eyewear. Your prescription will usually contain the following information: OD & OS; SPH; CYL; Axis; Add ; Prism ; A prescription for glasses is different from a contact lens prescription.
A ‘+’ sign indicates farsightedness, meaning you have trouble seeing up close. The higher the number, the stronger your prescription. CYL and Axis: If you have astigmatism, you’ll see a cylinder number and an axis number.
Eyeglass prescriptions include the headings OS and OD, but what do these letters mean? The abbreviations are Latin and represent the OS or oculus sinister, which is the left eye, and the OD or oculus dextrus, which is the right eye. You may notice the letters OU on your prescription. If those letters are present, it refers to both eyes.
Have you ever looked at the numbers and letters on your vision prescription and wondered what they mean? Whether you're a longtime glasses wearer or a newbie, knowing how to read your prescription will help you recognize when and how it changes.
When you look at it, though, you’re perplexed—what do all these letters and numbers mean? How do they tell you what kind of glasses you should get? Not to worry. Eye prescriptions can be confusing, but we’ll explain all of their different parts so you know how to read one.