J Korean Ophthalmol Soc.  2001 Jul;42(7):967-971.

Astigmatic Correction of LASIK

• Kim SJ
• Lee J
• Tchah H

Abstract

PURPOSE
The authors studied the results of excimer laser in situ keratomileusis for correction of myopic astigmatism.
METHODS
The authors studied the results of 108 eyes(83 patients) who underwent excimer laser in situ keratomileusis for correction of myopic astigmatism and had preoperative atigmatism greater than 0.5 diopter(D). Each patient had been followed up for over 12 months since January 1996. Refractive errors, uncorrected visual acuity(UVA) and best corrected visual acuity(BCVA) were measured at postoperative 1, 3, 6 months and 1 year, respectively. And astigmatic changes were analyzed by vector analysis using the Holladay formula.
RESULTS
Twenty-five patients were male; 58 were female. Mean spherical equivalent was -11.64 D +/-4.03 D preoperatively and -1.32 D+/-1.73 D at postoperative 1 year. In group I(31 eyes:0.50 D~0.75 D),II(46 eyes:1.00 D~1.75 D), III(15 eyes:2.00 D~2.75 D), IV(16 eyes:3.00 D~6.50 D), postoperative astigmatism were 0.60+/-0.73 D, 0.58+/-0.72 D, 0.75+/-0.89 D, 0.62+/-0.60 D at ostoperative 1 year. In 17.2% of all the eyes, axis deviation within 30 degrees was noted 1 year after the surgery. By vector analysis, astigmatic errors were corrected within 0.50 D of the attempted amount in 64.5% of group I, 63.0% of group II, 56.0% of group III and 66.7% of group IV. UVA was 0.5 or better in 69%, and 0.8 or better in 46% at postoperative 1 year.
CONCLUSIONS
BCVA did not change after the surgery in most of the eyes. The greater the amount of preoperative astigmatism, the more effective the postoperative astigmatic correction

Keyword

Astigmatism; Laser in situ keratomileusis; Refraction; Visual acuity

MeSH Terms

Astigmatism
Axis, Cervical Vertebra
Female
Humans
Keratomileusis, Laser In Situ*
Lasers, Excimer
Male
Refractive Errors
Visual Acuity