But what do all those numbers on your eyeglass prescription mean? The sphere is the strength of lens required to correct your vision. This is very low in each eye, the right eye being 0.25 and the left eye is "plano" (which means no sphere power at all). There is no astigmatism correction for this eye, so no cylinder power or axis is noted. The Federal Trade Commission (FTC) is the U.S. government's consumer protection agency. The choice "add half the cylinder value" is correct. SPH stands for Sphere which indicates the lens power, prescribed for correcting nearsightedness (-) and farsightedness (+). Therefore, the back curvature of these lenses will be the exact opposite of the front. Sphere – The term ‘Sphere’ means that the optical correction required is equal in all meridians (directions). A plano lens would have no focusing power or correction to it. or a superscript triangle when written freehand), prescribed to compensate for eye alignment problems. This eyeglass prescription also includes prismatic correction of 0.5 prism diopter in each eye. 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. The term means that the correction for your sight is spherical. BU, In this case, the eye doctor has prescribed -2.00 D sphere for the correction of myopia in the right eye (OD). In some cases the optician may write what appears to be a slash above the figure to indicate a "-" value. That piece of paper, full of mysterious short forms and numbers … what do they all mean? Other abbreviations you might notice on your eyeglass prescription include SPH, CYL, Axis, Add, and Prism. This doctor has elected to add "SPH," to confirm the right eye is being prescribed only spherical power. In the past, high sphere numbers meant you would be prescribed "Coke-bottle" glasses, but today a good optician will work with you to minimize lens thickness. The left eye (OS) is being prescribed -1.00 D sphere for myopia and -0.50 D cylinder for the correction of astigmatism. Eyeglass lenses are positioned at a distance from the eyes, while contacts rest directly on the eyes. Dist, refers to distance, this is the prescription required to correct distance vision. If you wear contacts, you’ll need a prescription specifically for contacts. The most basic of these curves is a sphere. If this is in the SPH section of an Rx, it means no nearsighted or farsighted correction is needed. If you are longsighted, the number will consist of a (+) sign. "pl" or "plano" needs to be entered as 0.00 into the SPHERE field when ordering glasses. This extra power will ALWAYS be the same for each eye and may only appear once on your prescription but it is understood to be meant for both eyes. Improve your driving at night: With tips on glasses and lenses. Are polarized sunglasses good for night driving? The sphere would vary in size based on the steepness of the curve. This box maybe empty or have a plus or a minus value in it. All of these mean you have no correction for astigmatism in one or both eyes. Cookies help us optimise your experience. 0. We say plano glasses, which often refer to the Spherical part of the Optometrist eyeglass Rx. ‘Sphere’ is basically a measure of how strong your prescription needs to be. Please note: this information pertains to eyeglass prescriptions only. Skip straight to the more unusual items. I opt-in to a better browsing experience. The prescription for the right eye--written as OD, which is Latin for Oculus Dexte--is always noted first. The Add, short for Reading Addition, is the additional correction required for reading, this can be used to make either reading glasses, bifocal glasses or Varifocal glasses. (Some doctors will add "DS" for "diopters sphere;" others will leave this area blank.). Prism powers will always be accompanied with a direction which is usually seen as a base diresction such as IN, OUT, UP and DOWN; for example; Prism 2.00 Base IN. Add. The number marked ‘axis’ describes the orientation of astigmatism. Glasses with no prescription are called Plano lenses, meanin g they have no visual correcting power. They are in decimal form and generally are written in quarter-diopter (0.25 D) increments. In the context of an eye prescription, ‘OD’ means ‘right eye’ and ‘OS’ means ‘left eye. 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. The sphere (Sph) specifies the strength of lens required to correct your focus - a plus sphere to correct long-sightedness (hyperopic - difficulty focusing on close objects) and a minus to correct short sightedness (myopia - difficulty focusing on distant objects.) (More on that later) Read on to learn everything you need to know about how to read glasses and contact lens prescriptions before shopping for eyewear. This is the amount of prismatic power, measured in prism diopters ("p.d." Then along the top, you may see this lingo. Sphere power, cylinder power and add power always appear in diopters. The DS here refers to diopters sphere which means the correction in the left eye is spherical in nature and has no astigmatism. There are three parts to the glasses prescription the sphere, the cylinder and the cylinder axis. The 90-degree meridian is the vertical meridian of the eye, and the 180-degree meridian is the horizontal meridian. The measurement is the Dioptre, and most values range from +0.50 to +3.50 and will go up in steps of 0.25. Latin abbreviations are often used in health care to write medical prescriptions and eyeglass prescriptions. A glasses prescription is not a contact lens prescription. In the context of an eye prescription. ", Your eyeglass prescription also may have a column labeled "OU." If you want to benefit from this improved service, please opt-in. This rule requires eye doctors to give patients a copy of their eyeglass prescription at the end of an eye exam that includes a refraction. You’ve just been to your optometrist for your regular check-up and may have been given a prescription for eyeglasses or contact lenses. Try this helpful quiz from EyeBuyDirect to guide you to the best fit for your unique style and personality. stands for oculus sinister, meaning left eye. When reading your glasses prescription you will find values under the headings of SPH, CYL, AXIS and sometimes PRISM & BASE . Plano means zero. How to Choose Safe Sunglasses for Driving, Eye Testing and Optical Coherence Tomography (OCT), How to: Adjust the arms on your eyeglasses.
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