How Do I Clean and Disinfect Gas Permeable Contact Lenses?
Astigmatism and Contact Lenses Deanna Harter, O.D., Reviewed by Marlane J. Brown, O.D. Introduction Astigmatism is a common condition where light entering the eye gets bent or focused unequally in one meridian versus another. A common analogy is a spoon (or football) with its curvatures varying, being less curved, or flatter, along the length of the spoon and more curved along the width of the spoon. A person with astigmatism sees a smear or shadow image coming off the object viewed. It can coexist with nearsightedness or farsightedness, and will cause things to appear blurry at distance and near. Uncorrected astigmatism may also cause eyestrain and headaches. Fortunately, it is usually easily corrected by glasses or contact lenses. Contact lenses that correct astigmatism fall into two main types: rigid gas permeable and soft. Both vary considerably in their advantages and disadvantages which will be detailed in this article. What is astigmatism? Astigmatism is a type of refractive err
