S-Space College of Medicine/School of Medicine (의과대학/대학원) Ophthalmology (안과학전공) Journal Papers (저널논문_안과학전공)
Contrast sensitivity after LASIK, LASEK, and wavefront-guided LASEK with the VISX S4 laser
- Kim, Tae Wan; Wee, Won Ryang; Lee, Jin Hak; Kim, Mee Kum
- Issue Date
- Slack Incorporated
- J Refract Surg. 2007;23:355-361
- Adult; *Contrast Sensitivity; Female; Glare; Humans; Keratectomy, Subepithelial, Laser-Assisted/*instrumentation; *Keratomileusis, Laser In Situ; *Lasers; Male; Myopia/*physiopathology/*surgery; Questionnaires; Retrospective Studies; Treatment Outcome; Visual Acuity
- PURPOSE: To evaluate the changes in contrast sensitivity and glare after corneal refractive surgery for moderate myopia. METHODS: The study comprised 267 eyes of 149 patients who underwent LASIK, laser epithelial keratomileusis (LASEK), or wavefront-guided LASEK with the VISX STAR S4. Contrast sensitivity was measured with VCTS 6500 before surgery and at 2 and 6 months postoperatively. Glare was evaluated using questionnaires and the ALC glare test at last follow-up. Contrast sensitivity at 2 and 6 months was compared with preoperative contrast sensitivity in each group. Glare sensitivity in each group was compared to normal controls. RESULTS: Contrast sensitivity did not change after LASIK (P > .05). Contrast sensitivity of 3 and 6 cycles per degree (cpd) at 2 months increased after LASEK (P < .05) and contrast sensitivity of 6, 12, and 18 cpd at 2 months and 3, 6, 12, and 18 cpd at 6 months improved in wavefront-guided LASEK (P < .05). Glare test and questionnaires did not show any significant difference between the groups. CONCLUSIONS: Wavefront-guided LASEK induced significant increases in contrast sensitivity of moderate myopes at high spatial frequencies under mesopic conditions by 6 months. Glare was not affected by the different refractive procedures.
- 1081-597X (Print)
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