Understanding your eye prescription is can be difficult, so here is a full explanation of the optical terminology and componants you may come across. The first four parameters have to do with your visual correction. Eyeglass is placed around 12 mm away from the eyes whereas contact lens is directly placed on the eyes, so significantly there's a difference in prescription. The Federal Trade Commission (FTC) is the U.S. government's consumer protection agency. For this reason, reading glasses offer a practical solution for people who spend a lot of time concentrating on close-up material. If the sphere number is in negative (-), it means you are nearsighted How to Treat Childhood Skin Problems. The prescription is usually a piece of paper or plastic that contains your … If nothing appears in this column, you have little or no astigmatism that requires correction. SEE ALSO: Differences Between Contact Lens and Eyeglass Prescriptions >. Now, reading your eye prescription will be less of a challenge for you. Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. They are abbreviations for oculus dexter and oculus sinister, which are Latin terms for "right eye" and "left eye. 2. Enter the shape, color, or imprint of your prescription or OTC drug. These glasses are often worn full time. The general form for writing these numbers is S x C x Axis. The Prescription Release Rule is intended to allow the "portability" of your eyeglass prescription so you have the ability to buy glasses from the vendor of your choice. The bigger this number, the more astigmatism you have. The PD is a crucial measurement we need to make your glasses. Specsavers senior optometrist, Dr Nigel Best, explains what the categories and numbers on your glasses prescription actually mean. The higher the prescription, the greater the curve of … In our example above, the first number to the right of OD is -2.00. The first set are standard - look through these to get a feel. BD, OS -1.00 -0.50 x 180 +2.00 add 0.5 p.d. © 2000-2020 AAV Media, LLC. Join our community to receive newsletters and offers. Eyeglass lenses are positioned at a distance from the eyes, while contacts rest directly on the eyes. What happens to FSA dollars at the end of the year? Sph means Sphere and indicates the basic degree of short or long-sightedness. Drug, supplement, and vitamin information on the go. If you wear glasses, it’s useful to be able to read your prescription – especially if you want to order new specs from an online retailer. On your eyeglasses prescription, the information for your right eye (OD) comes before the information for your left eye (OS). But how to read your contact lens prescription? What’s the difference between an HSA and FSA? The higher the number, the stronger the prescription lenses required. You can have up to 10 numbers written on your glasses prescription, as well as many lens options circled or checked off. An eyeglasses prescription is not a prescription for contact lenses. Skip straight to the more unusual items. Glasses-prescription-explained Understand your prescription. There is no astigmatism correction for this eye, so no cylinder power or axis is noted. Track your pain levels, triggers, and treatments. He or she probably mentioned that you are nearsighted or farsighted, or perhaps you have astigmatism. Your ophthalmologist or optometrist determines this power by trying different lenses while you read an eye chart in the exam. A plus or minus sign in front of your glasses prescription number is shorthand for near or farsightedness. The 90-degree meridian is the vertical meridian of the eye, and the 180-degree meridian is the horizontal meridian. On any prescription, PD can be written in different ways: e.g., 62 (Single PD), 33/31 (Dual PD), or 62/60 (Distance PD/Near PD). Glasses do more than improve your vision - they're an extension of your personality! They also may not disclaim liability for the accuracy of the prescription if you purchase eyeglasses elsewhere. Your Eye Prescription Explained. This can influence your choice of frames. This doctor has elected to add "SPH," to confirm the right eye is being prescribed only spherical power. The first four parameters have to do with your visual correction. If you feel your eye doctor has violated the rule or you want free information on other consumer issues, you can contact the FTC at 1-877-FTC-HELP. When present, the amount of prism is indicated in either metric or fractional English units (0.5 or ½, for example), and the direction of the prism is indicated by noting the relative position of its "base" (thickest edge). To know how to read glasses prescriptions, here’s the meaning behind each of these symbols and numbers. Rhegmatogenous retinal detachment is the most common type. It reveals the orientation of the astigmatism. If you are still confused or unsure with your prescription… Similarly, +1.00 would be a small amount of farsightedness and +5 would be more. ), OD -2.00 SPH +2.00 add 0.5 p.d. The second prescription means that the person has 3.5 diopters of farsightedness, 3 diopters of astigmatism and an axis of 45 degrees. Your prescription may include the following: SPH, CYL, Axis, ADD and Pupillary Distance (PD). Also, the power of an eyeglass prescription frequently is modified when determining the best contact lens power. Prescriptions for glasses are different to those for contact lenses and vice versa. Dominant eye test: How to find your dominant eye. Set goals and get tips with our app. To correct these problems, two main types of lenses are used: Convex/Plus (+) lens for nearsightedness and Concave/Minus (-) lens for farsightedness. Typically, you’ll see several abbreviations and words labeling all of the important data on your prescription. Keep your prescription up to date so these numbers can accurately reflect your visual needs. A – shows that you find it hard to see things that are far away without glasses. Cylinder (CYL). In the right eye, the prism is base down (BD); in the left eye, it's base up (BU). This is because contact lenses sit directly on the eyeball, whereas glasses rest about one centimetre away from your eyes. This is considered the "sphere" part of the prescription. This can influence your choice of frames. The sphere number indicates nearsightedness or farsightedness.1 1. This eyeglass prescription also includes prismatic correction of 0.5 prism diopter in each eye. OS, or Oculus Sinister, is the left eye. So, you've just had an eye exam, and your eye doctor has given you an eyeglass prescription. 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 added power" meridian contains the maximum power and lens curvature to correct astigmatism. Confused? The Axis is a number anywhere between 0 and 180 degrees. This can influence your choice of frames. Therapist Steven Sultanoff explains the utility of humor in counseling, and Jeffrey Briar leads a session of Laughter Yoga on Laguna Beach. Eye doctors write prescriptions this way because when they face you, they see your right eye on their left (first) and your left eye on their right … Most of us will eventually need a little help reading smaller text. (Some doctors will add "DS" for "diopters sphere;" others will leave this area blank.). Axis values are whole numbers from 1 to 180 and signify only a meridional location, not a power. In this serious condition, your retina -- a thin layer of nerve tissue in the back of your eye -- pulls away from its normal spot. The term "sphere" means that the correction for nearsightedness or farsightedness is "spherical," or equal in all meridians of the eye. Try this helpful quiz from EyeBuyDirect to guide you to the best fit for your unique style and personality. WebMD does not provide medical advice, diagnosis or treatment. Four abbreviations are used for prism direction: BU = base up; BD = base down; BI = base in (toward the wearer's nose); BO = base out (toward the wearer's ear). On your prescription, you’ll … If you are -4.25, that means you have 4 and 1/4 diopters of nearsightedness. The higher the prescription, the greater the curve of … Eyeglass prescriptions contain numbers—lots and lots of numbers. It's all about correcting the issue. A glasses prescription is not a contact lens prescription Spectacle and contact lens prescriptions aren't the same. BU, In this case, the eye doctor has prescribed -2.00 D sphere for the correction of myopia in the right eye (OD). Our eyeglass prescription and contact lens prescription are not the same. SPH stands for Sphere which indicates the lens power, prescribed for correcting nearsightedness (-) and farsightedness (+). Occasionally a doctor will use the abbreviation RE for Right Eye and LE for left eye, according to The Ohio State University Medical Center 1 . Prism. Your eye doctor must give you a copy of the prescription whether or not you ask for it. How older drivers can improve their driving at night. Complementary therapies to ease symptoms. For each prescription, we also included how it would appear when adding it to our website. Why You Should Rethink That Drink Before Dinner, New Clues Why Mosquitoes Find You Irresistible, Popular Heartburn Meds Can Have Health Risks, Your Eyewear Guide for Vision, Sport, and Fashion. You already know that the first step is to visit an optometrist or the ophthalmologist. Dist, refers to distance, this is the prescription required to correct distance vision. If you require spectacles for intermediate use include the INTER ADD in the ADD box when ordering and also advise us in the additional info box t… Inter, refers to intermediate, this is the prescription required to correct intermediate vision, and may appear in full, or as an additional power (ADD) to the distance. Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more. The prescription for the right eye--written as OD, which is Latin for Oculus Dexte--is always noted first. This is the amount of prismatic power, measured in prism diopters ("p.d." As we progress through our lives, the surface of our eyes becomes less flexible, making it difficult for us to focus on small or nearby objects and words. Are contact lenses a good choice for kids? The number might be very small, like 0.25, or a large number, like 6.00. That lets the vitreous gel -- the fluid from the middle of your eye -- leak under the retina. Sphere power, cylinder power and add power always appear in diopters. The higher the prescription, the greater the curve of … Hypoparathyroidism: How Can I Manage It Better. The big day is coming! The infographic below explains how glasses work to improve vision. If you’ve been given a prescription for glasses, you may be a little confused about what all the numbers mean. More on Framesbuy. Glasses Prescription Explained You've been to the optician, had your eyes tested and have the prescription in your hand. This is the added magnifying power applied to the bottom part of multifocal lenses to correct presbyopia. If an examination indicates that corrective lenses are appropriate, the prescriber generally provides the patient with an eyewear prescription at the conclusion of the exam. All rights reserved. or a superscript triangle when written freehand), prescribed to compensate for eye alignment problems. This is more nearsighted than -1.00, and requires stronger (thicker) lenses. When prism diopters are indicated in decimal form, typically only one digit appears after the period (e.g., 0.5). Sign up to receive WebMD's award-winning content delivered to your inbox. Are polarized sunglasses good for night driving? 12 Culprits. What do the numbers on your eyeglass frames mean? Minus (-) means you are shortsighted and plus (+) means longsighted. This is the abbreviation for the Latin term oculus uterque, which means "both eyes.". 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