It can be used to determine the strength of separate reading glasses or create bifocals. If you have astigmatism, the AXIS column will determine where your astigmatism is on the cornea.

We tried 23 online eyeglass retailers across various budgets and style offerings, and found four we recommend as the best ...

What is the controversy? There are two treatment strategies. Patients may be managed either with optical correction (bifocal glasses) or with surgery. What are the important issues? Are we treating a ...

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