Understanding Optical Terminology
Optical terminology can be confusing, with specialized words and expressions like CYL, SPH, AXE, ADD, PD, and more. This can make ordering glasses online challenging.
We have prepared this “Panto-Optics-In-Three-Minutes” guide to help you learn the language of optics.
Ready-Made Reading Glasses
If you do not need glasses for astigmatism (CYL) and the power is similar for both eyes, you can use this information to buy ready-made reading glasses (OTC – Over The Counter Glasses) from a hardware shop. Keep in mind: