The B stands for base, and it could be base down (BD), base in (BI), base out (BO), or base up (BU).ĬYL: the Cylinder.
Often used when a person has no sight in one eye, so both lenses will have the same thickness.īD, BI, BO, BU: a prism correction on your Rx (may be indicated with Δ, and one of these four abbreviations. It ranges from 1 to 180.īAL: the Rx calls for balance lenses, meaning the same Rx for each eye. A coating that reduces reflection on the lenses.ĪXIS: the angle at which the Cylinder (CYL) is placed on a lens to correct an astigmatism. Can be used for bifocal or progressive glasses, or for single-vision reading or computer (intermediate) vision glasses.ĪR: Anti-Reflective. Here is a list of some optical abbreviations that will help you order your glasses from Zenni Optical:ĪDD (also NV-ADD): the Near Vision (NV) Reading ADDition correction on a multifocal Rx. Can I get a list of optical abbreviations?.An eyeglass prescription will usually expire in 1-2 years, depending on which state you received your eye exam. If your prescription does not include your PD, you can measure it yourself with our guide here. PD is needed to determine where the optical center of the lens will be for clear, accurate vision. Lastly, eyeglass prescriptions sometimes include the pupillary distance (PD) measurement, which is the distance between your pupils.
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To learn more about how to read your prescription, click here. You may also have another field labeled as ADD which corrects for the reading power used in a bifocal or progressive lens. The CYL number and AXIS number correct for astigmatism. The SPH number corrects for nearsighted or farsighted vision. Within each of these rows are three values: Sphere (SPH), Cylinder (CYL), and Axis. The first row is the prescription for the right eye (OD), and the second row is for the left eye (OS). Eyeglass prescriptions may be written in different ways, though most are either printed or handwritten in horizontal rows. If you need glasses, your eye doctor will provide you with a prescription for corrective lenses. To compare yourself wearing different pairs, click "TRY ON" on a product listing page, or in your Favorites, for a static front view to see what looks best. Voila, your 3D Virtual Try-On is complete! To see yourself in glasses, click “TRY ON” on a product detail page, choose the image of yourself, and then move your mouse (or swipe for mobile) left and right on the Try-On image to see yourself from different angles in the frame. Use a standard card (such as a credit card), and place it against your forehead as instructed in order to make sure the glasses are scaled to the right size (you may skip this step, but we encourage you to do it for best fit). While doing this, you will want to make sure that your head is straight on and level, with your pupils clearly visible. Record a video of yourself turning your head side-to-side as instructed.
A light or plain background is best, such as a white wall behind you. After clicking “CREATE A TRY-ON,” you may need to allow your device access to the camera. However, using a 3D Virtual Try-On of yourself will be a much better guide to how the glasses will look and fit on your face than using a photo of a model. We encourage you to create your own video for the 3D try-on, but it’s not required.
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