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Aug 14, 2017
Eclipse may pose danger to those who view it
About 500 miles northeast of Madera, and elsewhere in the U.S., people will be able to see the sun’s corona, the outermost part of its atmosphere that is normally drowned out by the brightness of the sun itself. Here a crescent sun will be visible, but

Mar 05, 2015
Protect Yourself Against Eye Injuries
According to eye experts and doctors, 90% of workplace eye injuries could be avoided or lessened if safety eyewear was worn properly.

Mar 05, 2015
Restoring Eye Sight with Scleral Contact Lenses
There are contact lenses available for virtually every vision problem including astigmatism, presbyopia, postsurgical and keratoconus. At Natural Vision we are committed to providing the best contact lens technology to help you see your world.

How the Eye Works

For you to see clearly, your cornea and lens must bend, or refract, light rays and focus them on the retina, a layer of light-sensing cells that lines the back of the eye. The light rays are converted by the retina into impulses that are sent through the optic nerve to the brain, which recognizes them as images. If the light rays are not focused properly onto your retina, the image you see will be unclear. When this happens it is called a refractive error. The purpose of glasses, contacts and refractive surgery is to correct or reduce refractive errors by focusing light rays closer to or directly onto your retina. For information on correction of refractive errors see our Laser Vision Correction page.
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