J Korean Ophthalmol Soc.  2002 Dec;43(12):2391-2400.

The Evaluation of Contrast Sensitivity and Glare after LASIK Using Flying Spot Mode Laser According to Pupil Diameter and Refractive Error

• Choi KD
• Park HB
• Lee DH

Abstract

PURPOSE: To study the effect of LASIK using flying spot mode laser on contrast sensitivity and glare according to pupil diameter and preoperative refractive error.
METHODS
Fifty seven eyes of 42 patients had LASIK using MEL 70 G-scan (Asclepion Meditec, Germany) to correct myopia ranging from -2.50 to -10.50 diopter (D). The contrast and glare sensitivity were measured preoperatively and 1 week, 1 month and 3 months after LASIK using CGT-1000 (Takagi, Japan).
RESULTS
The mean preoperative spherical equivalent (SE) was -5.4+/-2.9D. The mean pupil diameter was 5.95+/-0.46 mm in scotopic condition. Contrast sensitivity was significantly reduced 1 month after LASIK, depending on pupil diameter and degree of preoperative myopia. However, values returned to preoperative figures thereafter (P<0.05). Glare sensitivity was improved at all frequencies 3 months after LASIK, and most significantly at high frequency (P=.031).
CONCLUSIONS
LASIK using employing the flying spot mode laser can effectively accomplish refractive correction without reduction of preoperative contrast and glare sensitivity values.

Keyword

Contrast sensitivity; Glare; LASIK; Visual quality

MeSH Terms

Contrast Sensitivity*
Diptera*
Glare*
Humans
Keratomileusis, Laser In Situ*
Myopia
Pupil*
Refractive Errors*