If you don't have astigmatism, this column will be left blank. The ADD column of your glasses prescription indicates any additional lens power your eyes require to read comfortably. It can be used ...

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Whether you have astigmatism that ... Our top 3 favorite places to buy glasses online with insurance: Best overall: Eyebuydirect Accepts FSA/HSA dollars for prescription eyewear Types of ...

Astigmatism occurs when the cornea—the transparent front surface of the eye—has an irregular shape, resembling a football rather than a perfectly round basketball. This uneven curvature causes light ...