purpose: to report a case who had undergone lasik in his right eye and prk in the fellow eye for correction of equivalent myopia but developed progressive post-operative keratectasia only in the right eye. patient and findings: a 30-year-old man had undergone lasik in right eye 3 years ago for correction of refractive error of -1.75  -1.50@48° and prk in left eye 2 years ago for correction of r...

ocular surface because of the absence of scleral flaps and are more likely to erode through the conjunctiva. Even a microscopic break in the overlying conjunctiva could result in bacterial contamination. It would be worthwhile to compare the incidence of endophthalmitis and suture exposure over the long term with the authors’ technique and the scleral flap method. Ajay Singh, MD Jay M. Stewart,...

PURPOSE We developed an instrument that permits non-contact, continuous, high speed and high precision monitoring of corneal thickness and tested the stability and reproducibility of measurements made over extended time periods and under various conditions of low surface reflectivity encountered during protracted exposure of the unmoistened corneal surface to ambient air. METHODS The optical ...

Corneal transplantation is the most frequently performed type of tissue grafting (George & Larkin, 2004). It is a highly successful treatment of severe corneal disease. However, transplantation of tissue and organs in humans has a major setback: availability of donors. To solve this, there are currently many studies on the possible use of the pig as a source of hearts, kidneys, livers, Islets o...

We read with great interest the article by Brenner et al.,1 which compares accuracy of visual estimation of LASIK flap thickness versus ultrasound measurements, and there are some concerns we would like to share. First of all, if the percent of tissue altered (PTA)2 is considered, a customized residual stromal bed should have been estimated for each patient, instead of setting the “safe level” ...

BACKGROUND Keratoconus (KC) is usually a bilateral corneal ectatic disease. For significant asymmetric presentation (so called unilateral KC), the fellow eye has the mildest and earliest form of the disease, which is typically called forme fruste keratoconus. The aim of this study was to evaluate the sensitivity and specificity of parameters derived from a Scheimpflug imaging system (Pentacam) ...