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Contrast sensitivity after LASIK, LASEK, and wavefront-guided LASEK with the VISX S4 laser

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Authors
Kim, Tae Wan; Wee, Won Ryang; Lee, Jin Hak; Kim, Mee Kum
Issue Date
2007
Publisher
Slack Incorporated
Citation
J Refract Surg. 2007;23:355-361
Keywords
Adult*Contrast SensitivityFemaleGlareHumansKeratectomy, Subepithelial, Laser-Assisted/*instrumentation*Keratomileusis, Laser In Situ*LasersMaleMyopia/*physiopathology/*surgeryQuestionnairesRetrospective StudiesTreatment OutcomeVisual Acuity
Abstract
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.
ISSN
1081-597X (Print)
Language
English
URI
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17455830

http://hdl.handle.net/10371/20029
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College of Medicine/School of Medicine (의과대학/대학원)Ophthalmology (안과학전공)Journal Papers (저널논문_안과학전공)
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