Astigmatism in Extracapsular Cataract Extraction with Posterior Chamber IOL Implantation

This investigation was undertaken to evaluate the natural and modified course of postoperative astigmatism, and to determine the stabilization time of refraction following extracapsular cataract extraction with posterior chamber IOL implantation. Among the patients who underwent extracapsular cataract extraction with posterior chamber IOL implantation performed by one surgeon(Kim) between April 1987 and August 1987, 46 patients who could be followed up over 6 months were included. The corneoscleral incision was closed with 7 to 8 interrupted 10/0 nylon monofilament sutures. In 10 eyes of 46 eyes the sutures were cut with a precut razor fragment under the operating microscope partially 6 weeks after operation or totally cut 2 months after operation. Our analysis demonstrated the following: A. Cases in which the sutures were not cut(36 eyes). 1. The mean initial corneal astigmatism after operation was 6.931 +/- 1.445 diopters. 2. The mean final cylinder after operation was 1.43 +/- 0.458 diopters. 3. There was no significant relationship between the initial corneal astigmatism and the amount of final cylinder after operation(correlation coefficient=0.0466). 4. The mean of stabilization time of refraction after operation was 3.083 +/- 1.052 months. 5. The relationship between the initial corneal astigmatism and the time of stabilization of refraction after operation was significant(correlation coefficient=0.3466). B. Cases in which the sutures were cut(10 eyes). 1. In 40% of eyes the pre-and postoperative corneal astigmatism were the same, and in 80% of eyes the change was equal to or less than 0.75 diopters.

Clinical Experience of Q-switched Nd:YAG Laser Iridotomy 50 cases for Angle Glosure Glaucoma

To evaluate the efficacy and immediate complications of Q-switched Nd:YAG laser iridotomy in the treatment of angle closure glaucoma, Q-switched Nd:YAG laser iridotomy using coherent model 7900(U.S.A.)was performed on 50 eyes, 43 patients with angle closure glaucoma between Feb. 1987 and Mar. 1988. Forty-six eyes of Thirty-nine Patients had been followed up {or more than 2 months. Four eyes were lost to follow-up. Among 50 treated eyes, 46 required a single laser session for patency and four eyes required two sessions. Intraocular pressure was significantly decreased after Q-switched Nd: YAG laser iridotomy and the continuous use of previous glaucoma medications as necessary(p<0.01). Immediate postoperative intraocular pressure elevation was seen in two Nd:YAG-treated eyes. Thirty-five eyes treated with the Nd:YAG laser had minimal bleeding from the iridotomy site. Forty-four Nd:YAG-treated eyes had transient iritis.