Journal of refractive surgery (Thorofare, N.J. : 1995) · 2009
LASIK with the optimized aspheric transition zone and cross-cylinder technique for the treatment of astigmatism from 1.00 to 4.25 diopters.
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Gamaly Tamer
Аннотация
PURPOSE: The predictability and safety of LASIK with the optimized aspheric transition zone (OATz) and cross-cylinder technique were evaluated for the surgical correction of myopia with 1.00 to 4.25 diopters (D) of astigmatism.
METHODS: In this prospective study, 74 eyes of 48 consecutive LASIK patients with astigmatism ranging from 1.00 to 4.25 D were evaluated. All eyes underwent laser ablation with profile 7 of the OATz algorithm with the NIDEK CXIII excimer laser platform. Refractive outcomes, visual acuity, and patient satisfaction were assessed based on 6-month postoperative data.
RESULTS: Preoperative manifest refraction spherical equivalent (MRSE) was -2.10+/-1.19 D (range: -0.50 to -5.75 D) and mean cylinder was -1.94+/-0.89 D (range: -1.00 to -4.25 D). At 6 months postoperatively, the mean MRSE for all eyes was 0.01+/-0.37 D (range: -0.75 to +1.00 D). Postoperatively, 78.3% (58/74) of eyes achieved uncorrected visual acuity (UCVA) of 20/20 or better, and 97.3% (72/74) of eyes achieved UCVA of 20/40 or better. Regarding predictability, 94.6% (70/74) of eyes were within +/-0.50 D of intended MRSE and 98.6% (73/74) of eyes were within +/-1.00 D of intended MRSE. Four (5.3%) eyes lost two lines of best spectacle-corrected visual acuity at 6 months. Stability was reached between 1 and 3 months and verified at 6 months postoperatively.
CONCLUSIONS: LASIK with OATz and the cross-cylinder technique is safe and predictable for the treatment of patients with astigmatism up to 4.25 D.
METHODS: In this prospective study, 74 eyes of 48 consecutive LASIK patients with astigmatism ranging from 1.00 to 4.25 D were evaluated. All eyes underwent laser ablation with profile 7 of the OATz algorithm with the NIDEK CXIII excimer laser platform. Refractive outcomes, visual acuity, and patient satisfaction were assessed based on 6-month postoperative data.
RESULTS: Preoperative manifest refraction spherical equivalent (MRSE) was -2.10+/-1.19 D (range: -0.50 to -5.75 D) and mean cylinder was -1.94+/-0.89 D (range: -1.00 to -4.25 D). At 6 months postoperatively, the mean MRSE for all eyes was 0.01+/-0.37 D (range: -0.75 to +1.00 D). Postoperatively, 78.3% (58/74) of eyes achieved uncorrected visual acuity (UCVA) of 20/20 or better, and 97.3% (72/74) of eyes achieved UCVA of 20/40 or better. Regarding predictability, 94.6% (70/74) of eyes were within +/-0.50 D of intended MRSE and 98.6% (73/74) of eyes were within +/-1.00 D of intended MRSE. Four (5.3%) eyes lost two lines of best spectacle-corrected visual acuity at 6 months. Stability was reached between 1 and 3 months and verified at 6 months postoperatively.
CONCLUSIONS: LASIK with OATz and the cross-cylinder technique is safe and predictable for the treatment of patients with astigmatism up to 4.25 D.