When you look at your prescription from an eye doctor, astigmatism is indicated by two specific values beyond the standard sphere (SPH):
A number between 1 and 180 that defines the orientation of the astigmatism correction. Both CYL and Axis are required to order astigmatism-correcting lenses online. 2. Measuring Your Pupillary Distance (PD) buying glasses online astigmatism
Buying glasses online with astigmatism is entirely possible and often more affordable, provided you have a precise prescription and understand a few key technical details. Astigmatism requires specific lens corrections for the eye's irregular curvature, making the accuracy of your input data critical for clear vision. 1. Decoding Your Prescription for Astigmatism When you look at your prescription from an
This number (e.g., -1.25 or +0.75) represents the amount of lens power needed to correct the astigmatism. If this column is blank or says "SPH" or "DS," you do not have astigmatism in that eye. Measuring Your Pupillary Distance (PD) Buying glasses online