Aspheric ablation with the Nidek EC-5000 CX II with OPD-Scan objective analysis
| Autor: | Sanjay Mantry, Sunil Shah, Ian Y L Yeung |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Adult
medicine.medical_specialty genetic structures medicine.medical_treatment Corneal Stroma Keratomileusis Laser In Situ Visual Acuity Objective analysis Spherical equivalent Keratomileusis Astigmatism Refraction Ocular Optics Ophthalmology medicine Myopia Humans Aged Retrospective Studies Physics business.industry LASIK Middle Aged medicine.disease Ablation Refraction eye diseases Treatment Outcome Surgery sense organs Safety business Ablation zone |
| Zdroj: | Journal of refractive surgery (Thorofare, N.J. : 1995). 20 |
| ISSN: | 1081-597X |
| Popis: | PURPOSE: To analyze the efficacy, predictability, stability, and safety of laser in situ keratomileusis (LASIK) to correct myopia and myopic astigmatism using the Nidek EC-5000 CX II laser and the Customized Aspheric Transition Zone (CATz) profile. METHODS: We conducted a retrospective analysis of 100 eyes (50 patients) with myopic astigmatism. A CATz profile was used in all eyes (profile 4) with an ablation zone of 5 mm and a transition zone of 9 mm, using Nidek FinalFit software. RESULTS: Average patient age was 39 years (range 21 to 69 yr). Preoperative mean spherical equivalent refraction was -4.70 ± 2.53 D (range -11.88 to -0.50 D), mean preoperative sphere was -4.31 ± 2.53 D (range -11.25 to -0.25 D), and mean preoperative cylinder was -0.78 ± 0.69 D (range -3.25 to 0). Postoperative mean spherical equivalent refraction at 6 months was 0.12 ± 0.53 D (range -1.63 to +0.88 D), mean postoperative sphere was 0.02 ± 0.56 D (range -1.50 to +2.00 D), and mean postoperative cylinder was -0.29 ± 0.50 D (range 0 to -1.75 D). Uncorrected visual acuity was 6/6 or better in 58% (58 eyes) and better than 6/12 in 93% (93 eyes). CONCLUSION: LASIK with the Nidek EC-5000 CX II laser and the CATz profile was effective, reasonably predictable, stable, and safe for correction of myopic astigmatism with a spherical component between -0.25 and -11.25 D, and a cylindrical component up to 3.25 D, using the techniques in this study. Astigmatism was undercorrected with the current algorithm. [J Refract Surg 2004;20 (suppl): S666-S668] |
| Databáze: | OpenAIRE |
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