What body systems and organs are affected by astigmatism?

Eyes: Astigmatism is caused by changes in the cornea of the eye. The cornea functions as the watch crystal focusing light into the eye. Astigmatism is the natural changes in the cornea that is one cause of a patient needing glasses or contacts. Astigmatism can be measured by special computers in your eye doctors office!

Astigmatism: Is a refractive disorder of the eye, kind of like a variant on nearsightedness (myopia) or farsightedness (hyperopia). Most of the time it can be corrected by glasses or contacts, but if left uncorrected it can cause blurry/distorted vision, headaches, eyestrain, and balance issues.