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:
SPH | CYL | Axis | ADD | Prism | Base | |
R (OD) | +1.00 | -0.50 | 179 | +1.50 | 2 | Up |
L (OS) | -0.50 | -1.25 | 003 | +1.50 | 2 | Down |
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.