In addition to the general parameters, eyeglass prescriptions can require a Pupillary Distance (PD). Clearly does not offer prism prescription glasses. It is indicated as follows:Įach one of these indicators provide information about the base direction or the thickest edge of the prism. It is required when eye alignment needs assistance. Prism: measured in prismatic diopter (p.d.). Some glasses prescriptions also include additional numbers such as:Ħ. Most of the time, OD and OS are indicated on the left of your prescription and the following numbers show each eye’s specific needs. There is a separate prescription for your right eye and your left eye.
These are for Anti-Fatigue lenses such as our SightRelax lenses. Occasionally, lower add powers than +0.75 can be found on a prescription. You will most likely have the same number for both eyes that usually ranges between +0.75 and +3.00. ADD: provides magnifying power for reading, bifocal, multifocal and progressive lenses. Both parameters will be required together.ĥ. CYL & AXIS: a Cylinder (CYL) and Axis number (between 0 and 180 degrees) are required to correct Astigmatism. It is measured in diopter and uses (+) for farsightedness (hyperopia) and (-) for nearsightedness (myopia).Ĥ. SPH “sphere” indicates the amount of lens power prescribed for nearsighted or farsighted vision. OS “oculus sinister” shows your left eye’s parameters.ģ. OD “oculus dexter” indicates your right eye’s parameters.Ģ. Here’s the meaning behind each of these letters and numbers on your glasses prescription:ġ. PD is a crucial measurement we need to make your glasses. The first four parameters have to do with your visual correction. Your prescription may include the following: SPH, CYL, Axis, ADD and Pupillary Distance (PD). What do the numbers on my prescription mean? We’ll be happy to contact your Eye Care Provider to verify your prescription for you. If you get stuck, get in touch with our Customer Service team. The following tips will help you decipher and understand your eyewear prescriptions. What are the key differences between a glasses and contact lens prescription?.How do I read contact lens prescription?.
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Follow our guide to find the answers on how to read glasses prescriptions: Let’s start with some of our most frequently asked questions about glasses and contact lens prescriptions. Prescription eyeglasses and contact lens prescriptions: FAQ Read on to learn everything you need to know about how to read glasses and contact lens prescriptions before shopping for eyewear. If you wear contacts, you’ll need a prescription specifically for contacts. There’s one key thing to remember about glasses and contact lens prescriptions: the measurements are different.Ī glasses prescription is intended for the purchase of glasses only – it does not include information that is required in a contact lens prescription.
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We’ll help you understand what your eye care professional means by all those numbers and letters on your prescription, so you can enter these details with confidence when you shop for eyewear online. Looking for an easy explanation on how to read your glasses or contact lens prescription? You’re in the right place.
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