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Grayson is blind, the result of a rare genetic disorder that stunts the development of the iris and the crystalline lens covering the eye.

When you’re reading, looking at a map or squinting toward the horizon, your eyes adjust themselves involuntarily and instantaneously, thanks to tiny muscles inside the crystalline lens that can bend it and change its shape.

The company's Visian Toric implantable lens is placed in the posterior chamber of the eye between the iris and the natural crystalline lens to correct both myopia and astigmatism in a single procedure.

The Catalys system is approved for use in the United States and Europe in procedures that remove the crystalline lens, a part of the eye that can become clouded and impair vision.

An anomalous state of refraction caused by the absence of the crystalline lens, as after operations for cataract.