The American Society of Cataract and Refractive Surgery - Good resource for those considering a surgical correction of cataracts, astigmatism, myopia, and hyperopia. It details various types of surgery along with their benefits and risks . Shows video cli

U-M Kellogg Eye Center - Describes types of procedures  and how they help myopia, astigmatism, and hyperopia. Links to more detailed information on corneal ring segments, LASIK and PRC surgery.

SLACK - Journal of Refractive Surgery - Use it to search for information on  visual impairments such as myopia, astigmatism, hyperopia, etc.  Obtain an extensive list of links to somewhat technical reports of surgical procedures and studies. Also contains

eMedicine - Describes LASIK, PRC, and Clear Lens Extraction procedures for myopia, astigmatism, hyperopia, presbyopia, and anisometropia.  Includes indications, counterindications, lab studies, postoperative details, and medicinal therapy.

Abilene Eye Institute Cataract & Refractive Surgery Center - Outlines various surgical procedures for cataract and other surgeries. Describes what to expect, how eyesight will be affected, and recovery.