Central corneal pachymetry in patients undergoing laser in situ keratomileusis.

Objective: To report the preoperative ultrasonic central pachymetric measurements on a large group of eyes undergoing laser-assisted in situ keratomileusis (LASIK) surgery for myopia and myopic astigmatism, to determine whether central corneal thickness is correlated with other geometric features of the eye or is correlated with age or gender, and to discuss the resulting limitations on possible ablation depths.

Design: Prospective, multisite, cross-sectional study.

Participants: Eight hundred ninety-six eyes in 450 patients from 21 to 66 years of age.

Management of postkeratoplasty astigmatism.

Many factors have led to the improved success rate for clear corneal grafts after penetrating keratoplasty. Unfortunately, postoperative corneal astigmatism commonly occurs and can produce significant visual impairment. Astigmatic correction may include spectacle correction or contact lenses, but if this fails, then surgical options are considered.