Buying Guides & Tools

Read your prescription, measure your PD, decode lens coatings, and use our True Annual Cost calculator to find the cheapest retailer for your eyes.

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Decode OD/OS, SPH, CYL, AXIS, ADD and PD so you can enter your prescription correctly at any online glasses retailer, plus where to buy by need.

Measure your PD at home for ordering glasses online: single vs dual PD methods, the mistakes to avoid, and retailers with a free digital PD tool.