Photorefractive keratectomy to treat myopia and astigmatism after radial keratotomy and penetrating keratoplasty.

Fifteen eyes with an initial myopia between -5.00 diopters (D) and -12.00 D were treated with radial keratotomy (RK) followed by photorefractive keratectomy (PRK) at least 6 months later and observed for 6 months to 24 months.

The correction of high myopia using the excimer laser.

Objective: To determine the safety and efficacy of excimer laser photoablation as a treatment to correct high myopia that is defined as a spherical equivalent refractive error greater than -8.00 diopters (D).

Design: Using a multizone (4.

Effect of PMMA and silicone lens materials on normal rabbit corneal endothelium: an in vitro study.

Various silicone elastomer intraocular lens materials were compared to PMMA intraocular lens material to ascertain the relative degree of damage caused by each to the rabbit corneal endothelium in vitro. The soft elastomer materials which had been surface treated by electrical molecular rearrangement appeared to cause the least damage and would therefore possibly be most successful for intraocular lens manufacture.