Locations

Tyler

2440 E. Fifth Street
Tyler, TX 75701
903-595-0500
800-595-2040

Athens

608 S. Palestine
Athens, TX 75751
903-677-5804

Bullard

151 Hwy. 69 N., Ste. 1000
Bullard, TX 75757
903-894-8217

Jacksonville

305 W. Rusk
Jacksonville, TX 75766
903-586-9611

Lindale

1440 S. Main
Lindale, TX 75771
903-882-8990

Winnsboro

408 S. Main
Winnsboro, TX 75494
903-342-5799

How the Eye Works

Basic Eye Anatomy	The Farsighted Eye (Hyperopia)	What Does 20/20 Mean?
Astigmatism	The Nearsighted Eye (Myopia)	The Old Eye (Presbyopia)

Your eye functions much like a camera. In order to have normal (20/20) vision, all of the parts must work together properly, and the optical system must be correctly aligned. Light rays form objects in our environment are bent (refracted) by the cornea and the crystalline lens inside the eye. When the eye is working properly, a sharp image is formed on the retina, a layer of nerve cells lining the inside of the eyeball that can sense light. When the optical system of the eye does not focus properly, we say that the eye has a "refractive error." Refractive errors can be corrected with glasses, contact lenses, or surgery, to restore clear vision. This section describes the optics, anatomy, and the refractive errors of the eye.