Get a prescription paper written specifically for eyeglasses.
Note: The prescription for contacts CANNOT be used for eyeglasses.
Let's take the following data as an exmaple:
|PD 64 - OR - R 32 / L 32|
|OD||Right eye, latin for Oculus Dexter|
|OS||Left eye, latin for Oculus Sinister|
|OU||Both eye, latin for Oculus Uterque|
|SPH||Abbr. of Sphere, the degree of correction, it corrects your near or farsightedness.|
|CYL||Abbr. of Cylinder, it corrects your astigmatism, it will be 0 if you don't have astigmatism|
|Axis||It indicates the orientation of astigmatism, measured in degrees from 1 to 180. It must follow with CYL. NO CYL, NO AXIS|
|ADD or NV||Addition or Near Vision, it is calculated for getting the correction for reading or near vision, it can be used for bifocal or multifocal progressive glasses.|
|Prism||Prismatic value, it is needed to compensate for any alignment problems in your eyes.|
|Base||The direction of a prism. There are 4 directions, up, down, in, out.|
|PD||Pupillary Distance. It's the distance in millimeters between the center of one pupil to the center of the other. How to measure my PD?|
Now that you know what these terms mean, you know how to read a glasses prescription, which is the most important part of learning how to buy prescription glasses online.
Now you can shop online.