If you do not understand how to read your prescription, please call us or email your prescription to ensure everything is entered correctly. We will work to guarantee that your lenses are made precisely according to your doctor’s specifications.
Distant |
Sphere |
CYL |
Axis |
Prism |
Base |
BC |
OD |
-2.50 |
-0.75 |
170 |
|
|
|
OS |
-1.75 |
-0.50 |
20 |
|
|
|
ADD |
OD |
|
PD = 62 |
|
|
OS |
|
Eyeglass prescription issued by different doctors may differ in format, but they somewhat look like the one above.
The OS means your left eye and the OD means your right eye. There will be a plus or minus sign in front of the numbers. A plus sign means you are farsighted and a minus sign means you are nearsighted. The higher the numbers, the more your vision needs correction.
If you have astigmatism, your prescription should read as follows: SPH /CYL x Axis,
for example: -2.75 /+1.00 x 45
SPH is the sphere or “power” (the negative or positive number used to determine the degree of nearsighted or farsightedness), CYL is the cylinder (the negative or positive number used to measure the focusing power of your lens), and Axis refers to the amount of curvature in the lens from 0 to 180 degrees.
When ordering bifocals or multifocals the distance vision power correction is given with an ADD power e.g.
R -1.00/-1.25 x 55 ADD +2.00
L -1.50/-1.50x165 ADD +2.00
If there are no numbers for CYL, AXIS or ADD in your prescription, do not enter anything in these fields when ordering. When only one number appears for each eye, it is for the sphere power only.