Effect of different suture methods on corneal curvatures.

The authors studied prospectively the corneal curvature of senile cataract patients at the Department of Ophthalmology, Faculty of Medicine Siriraj Hospital, Mahidol University between January 1993 and June 1995. The corneal curvature of the group 1 patients (103 eyes) with the interrupted suture method in the vertical meridian and horizontal meridian preoperatively = 43.70 + 1.47 D and 44.26+ 1.72 D and postoperatively = 44.58+ 1.89 D and 44.22+ 1.73 D respectively. The corneal curvature of the group 2 patients (71 eyes) with the continuous suture method in the vertical meridian and horizontal meridian preoperatively = 43.27+ 1.75 D and 43.63+ 1.39 D and postoperatively = 43.92+ 1.96 D and 43.61+ 1.77 D respectively. The changes in corneal curvature in the vertical meridian of both groups showed a slight difference but in the horizontal meridian no difference was shown.

Postoperative astigmatism following intraocular lens implantations.

During the period from 1st January 1987 to 31st December 1988, a total of 80 patients (33 males, 47 females) total 100 eyes; right eye 56, left eye 44), age of 43-89 years, underwent extracapsular lens extraction and posterior chamber intraocular lens implantation at the Siriraj Hospital. When 2 months after operation, the refraction were measured by retinoscopy which revealed. Emmetropic eye (4%); 29 Spherical refractive error (29%); 67 Astigmatism (67%). Among the cases with astigmatism under 2 were 27 Sphero-cylinder, 31 Sphero-cylinder with minus cylinder. 54 of astigmentism under 2 diopters of cylinder and 13 over 2 diopters of cylinder. The average of astigmatism was 1.63 diopters of cylinder and the maximum value of cylinder was 4 diopters. The axis of cylinder (the power of cylinder minus lens) was of 90 degrees = 39; at 180 degrees = 14 and at other degree = 14.