The number under 'cylinder' provides the lens power needed to correct the astigmatism. The ADD value is also referred to as a "Near Addition" or "Reading Addition". To make a purchase on our Canadian site, you'll need to create a separate account. Create an account to follow your favorite communities and start taking part in conversations. This number always has a (+) sign. COPYRIGHT document.write(new Date().getFullYear()); ZENNI OPTICAL , INC. ALL RIGHTS RESERVED. That is to say, the OD means the right eye and OS means the left eye. The PD/Pupillary Distance is generally measured during a sight test, but is not routinely written on a prescription, you can ask for this from your Opticians, or ask them to add it to your prescription when you are tested. How Do You Keep Your Glasses From Fogging Up With A Ski Mask? The CYL and AXIS compensate for an astigmatism. Free Express Shipping and 30-Day Returns Worldwide. These are needed to tell us how to shape the lens so that it can accurately align the wearers eyesight. Knowing what they mean will also help you more easily discuss your prescription with your eye care professional. In the context of an eye prescription, OD means right eye and OS means left eye. For example, if the Add were +2.25 and the OD-Sph was -0.50, the new OD-Sph for reading glasses would be +1.75; if the Sph were +0.25, the new Sph would be +2.50. If the axis changes by more than 90, you need to consult an eye specialist. CYL (Cylinder)CYL is a + or - value in 0.25 steps and is required to correct your astigmatism. What are the different types of contact lenses? The cyl power has its axis at the 180 meridian, meaning the horizontal (180-degree) meridian of the eye has no added power for astigmatism and the vertical (90-degree) meridian gets the added -0.50 D. Both eyes are being prescribed an "add power" of +2.00 D for the correction of presbyopia, and this eyeglass prescription includes a prismatic correction of 0.5 prism diopter in each eye. The measurement is the Dioptre, and most values range from +0.50 to +3.50 and will go up in steps of 0.25. Sphere, often written as SPH, means that the correction for nearsightedness or farsightedness is spherical, equal in all meridians of the eye. 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. If you dont have any medical issues that affect your vision, you should have a comprehensive eye exam every one to two years. Usually your lenses will be positioned around 10-12mm from your eyes, however this will vary from person to person. When you enter your prescription during checkout, please select "Not Applicable" for all Cylinder and Axis fields, thank you. How to read eye prescription? A contact lens prescription can only be obtained from a contact lens consultation and fitting. The CYL basically represents the main differences in the weakest as well as greatest eye powers which are usually separated by degrees (90). The measurement is Prism Dioptre. Youll typically find the abbreviates OD and OS on the left side of your prescription. The number 90 corresponds to the vertical meridian of the eye, and the number . You will also have a corresponding "AXIS" value (see below).When no astigmatism correction is required the optician will leave the box blank. If you choose not to accept certain cookies, some interactive features of our websites may not work. Near is the prescription to correct near vision and may appear in full, or as an additional power (ADD) to the distance. Can someone help me out here? Register so we can email you as soon as its becomes available! But keep in mind, all eyewear is different, so its just a general reference. How to Read Your Prescription for Glasses. Checkout now! What does "SPH" appearing under Cylinder on my prescription mean? We always recommend attaching a copy of your prescription to the order, or fax this through or email it separately, we will double check the prescription this end to ensure the correct lenses are produced. Click here if your prescription looks different to this form. as shown in the image below. If the number is written, this is the indication of the usage of eye contact. ADD. The higher the number on your prescription, the stronger your prescription is. In addition, most prescriptions willshow your pupillary distance (PD), the horizontal distance between your pupils. When you hold the prescription, have you ever been curious to know what the number and letters mean for your eyesight? 5. | The number appearing in this section of the prescription is always a "plus" power, even if it is not preceded by a plus sign. If you have an astigmatism, you will find a "+" or "-" value in this box. What does SPH mean for glasses? If you experience difficulty in obtaining this measurement we can record it, if necessary, from an existing pair of your glasses, to find out more click here. Liingo Eyewear is another great option to buy glasses online. If nothing appears in this column, either you have no astigmatism, or your astigmatism is so slight that it is not really necessary to correct it with your eyeglass lenses. Typical SPH numbers range between 0.00 and +/- 20.00. 'Add' +2.50 - should be entered for both eyes). 'Sphere' is basically a measure of how strong your prescription needs to be. Press question mark to learn the rest of the keyboard shortcuts. This value is the amount to add on to the distance SPH values to ascertain what the full Near prescription should be. This stands for cylinder, and it refers to the strength of the lenses needed to correct your astigmatism. If you have an astigmatism, indicated by an axis and cylinder number on your prescription, it means that the front of your eye is irregularly shaped. Enter your email address to make it happen. Learn about LASIK success rates and side effects, Learn about the costs associated with LASIK, Benefits of LASIK for astigmatism correction, How to find vision insurance that covers LASIK, Compare PRK and LASIK procedures and results, 14 tips for protecting your vision after LASIK. If this column is blank, it means you dont have an astigmatism. If this column is blank, it means you have no astigmatism. 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. What If My Prescription Does Not Follow The Format on Your Website? A minus (-) symbol next to this number means youre nearsighted, and a plus (+) symbol means the prescription is meant to correct farsightedness. See below to learn the meaning of SPH, CYL Axis, Prism, PD, and more. The number under the OD and OS measurement in your prescription is measured in diopters. ; values are usually entered with computer, but may be handwritten by doctor. to Fri (9am - 5pm) It is used to correctly orientate the cylinder correction when making your glasses. A multifocal prescription will include an ADD value, sometimes marked as NV. Children should have their first eye exam when they are around six months old, and then another just before they start school. It is the amount of magnification required to "ADD" to the "SPH" value of your "Distance" prescription to correct your near vision. "How to Read Your Eyeglass Prescription. What Is The Difference Between A Retinal Tear And A Retinal Detachment? Only a small percentage of eyeglass prescriptions include prism. Astigmatism relates to an issue in the curvature of yourcorneathat causes blurred distance and near vision, especially at night. Here at Spex4Less, you will find both of these options directly above the prescription form. This is why you need to go to a local optician, not buy online. By Email or 0330 165 6900, Site Map Unlike SPH measurement, CYL measurement will tell your eyeglass manufacturer how much curvature is needed on your lens to balance out the meridians of your eyes. It would be entered on our website as below: Our online prescription form initially displays the most common format, Distance with a Near Add. Theplus (+) orminus (-) sign before SPH indicates whether you are nearsighted or farsighted. Some people may have prism in two directions for one eye, for example; Prism 2.00 Base IN & 1.00 Base UP. These include: Sphere indicates the amount of lens power, measured in diopters(D), prescribed to correct nearsightedness or farsightedness. This is a common question when the person who consults eye specialists encountered the eye prescription. BVD - Back Vertex Distance is the distance required from the front of your eye (cornea) to the back surface of the corrective lens. Thats where your new prescription from your optometrist or ophthalmologist comes in. SPH is a + or - value in 0.25 steps and is required to correct your nearsightedness (-) or farsightedness (+). Cylinder: The cylinder (CYL) number indicates the . What the values on your prescription mean. The number marked 'axis' describes the orientation of astigmatism. What is CYL, AXIS and SPH? The number under 'cylinder' provides the lens power needed to correct the astigmatism. CYL (Cylinder) CYL is a '+' or '-' value in 0.25 steps and is required to correct your astigmatism. If this is the case, your prescription will display SPH, CYL & AXIS values in both the "Distance" and "Near" sections of the prescription. SPH indicates the adjustment for spherical power, with . You can measure your current frame from screw to screw, which is already a perfect fit for you . Essentially this means correction for Astigmatism is not required for the prescription being considered. Through her writing, Dr. Huang enjoys educating patients on how to lead healthier and happier lives. It is not a condition, or disease. A minus (-) symbol next to this number means you're nearsighted, and a plus (+) symbol means the prescription is meant to correct farsightedness. The Axis in your prescription is usually measured from 1 to 180. In the following picture, you can see an eye prescription. This means that a person can see the object clearly at 20 feet. Should I get a second opinion? There will also be a number in the axis column thats needed for astigmatism correction. That means that you have no astigmatism to correct in that eye. On your eyeglasses prescription, the information for your right eye (OD) comes before the information for your left eye (OS). If you have been provided with a BVD value ensure to enter it into the additional information or comments box provided with any online prescription forms. The axis is labeled as a number from 1 to 180. DS simply means no power is present in the CYL box so leave this as NONE or DS.