Use this eyeglasses Rx example and term definitions table to help solve the once confusing puzzle known as your prescription! Keep in mind, not all prescriptions will have these fields filled out.
Eyeglasses Rx Example
How do I read my Single Vision eyeglasses prescription?
How do I read my Reading eyeglasses prescription?
How do I read my Progressive & Bifocal eyeglasses prescription?
Eyeglasses Rx Terms
|OD||Right Eye||Right eye paramaters|
|OS||Left Eye||Left eye paramaters|
|SPH or PWR||Sphere or Power||Measure of near or far sightedness||-12.00 to +6.00|
|CYL||Cylinder||Measure for astigmatism||-3.75 to +3.75|
|X||Axis||Direction of cylindrical lens||0° to 180°|
|ADD||Add Power||Additional plus power for near sightedness||1 to 4, or HIGH, MED, LOW|
|PRISM/BASE||Optical Prism||Measure to compensate for eye alignment problems||0.5 base up (BU)|
|PD||Pupillary Distance||Measure of distance between pupils||Adults: 58mm to 70mm, Children: 41mm to 58mm|