What is Astigmatism and How is it Corrected?

Many persons who are neither farsighted nor nearsighted must wear glasses or suffer from headaches.This is caused by a defect of the eye called astigmatism, which results from the unequal curvature of the cornea (the front of the eyeball).What effect will this have upon the bending of the different rays of light that enter the eye?The glasses for these eyes are curved in such a way that the defects of the cornea are counteracted.If glasses are not worn, the ciliary muscle in its effort to bring about a condition which will result in a clearer image is overworked and eyestrain and headache result. If you are troubled with eyestrain or headache after using the eyes for some time, have your eyes examined at once by a competent oculist or optometrist.Eyestrain results in both discomfort and lessened efficiency.Frequently headaches, nervousness, and other troubles are relieved as by magic when eyestrain has been removed by the use of proper glasses.  more