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How to Read an Eyeglass Prescription
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Play How to Read an Eyeglass Prescription
SPH (Sphere)

Spherical error, or overall power of lens is the basic part of your prescription. A (+) means you have trouble seeing near, and a (-) means you have trouble seeing things faraway.

CYL (Cylinder) & Axis

A cylinder value indicates astigmatisms or perpetually blurry vision. Axis—measured between 1 and 180°— tell us the orientation of the astigmatism

ADD (Addition)

This number is sometimes written NV for near vision and is used for multifocal lenses and readers

PRISM

We can process prism prescriptions to correct eye orientation

Vertical Prism is used to help correct vertical eye misalignments and is prescribed in opposite directions for both eyes

Horizontal Prism is used to help correct lateral eye misalignments and is always prescribed in the same direction for both eyes

Pupillary Distance
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Play Pupillary Distance
PD (Pupillary Distance)

It's just what sounds like—the distance in millimeters (mm) between your pupils. An average PD measurement is 63 mm, but varies by person. If it's not on the prescription, you can measure it yourself by:
• printing the downloadable PD ruler.
• watching our tutorial video.

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Home>Sunglasses>Square Sunglasses

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    Square Can Be Hip

    Don't worry about sitting a couple of boxes in front of your eyes. While we label them as such, square frames aren't truly squares — they’re slightly asymmetrical with rounded corners. The look they achieve, however, is anything but ordinary.

    Square sunglasses are bold and striking, no matter the color or material you choose. They might be simple, but square sunglasses make a statement, which is why they always seem to be fashionable, no matter the era. They also bring about a sense of intelligence to your look, adding an intelligent, almost geek-chic look to your appearance. Who doesn't want that kind of energy added to their look?

    Square for Your Hair

    Square glasses are perfect for people with oval and round faces, balancing out their facial curves with a few interesting angles. But what about your hair? Surprisingly, square frame glasses fit well with a lot of different hair styles.

    Whether you sport short locks, a medium-length bob or some seriously long tresses, square frames can only add to your appearance. You can even rock a ponytail, man-bun or a shaved head! Whatever your hair's doing, your square frames can complement it. It can even distract people from your bad hair day, directing their attention to your eyes and cheekbones.