Treatment of mixed astigmatism: early clinical outcomes withWaveLight and Technolas excimer lasers

Ae, Kilavuzoğlu; Gönen, Tansu; Ar, Celebi; Yurteri, Coşar; Ab, Şener

doi:10.3906/sag-1504-35

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…There was high treatment safety as no patient lost two or more lines of CDVA, which is consistent with many of the previous studies [8,[12][13][14][15][16][17][18][19][20][21]. At 12 months postoperatively, 80.8% of patients had a refractive cylinder no greater than 0.50 D and 100% had cylinders no greater [15,19,21,22], but only one study reported fewer than 60% of patients having a refractive cylinder no greater than 1.00 D [19]. Our results suggest that our findings are consistent with previous studies and showed improvement on other variables such as the mean reduction in refractive cylinder.…”

Section: Discussionsupporting

confidence: 89%

“…The study demonstrated that by 12 months, 88% of patients had an SEQ no greater than 0.50 D of their intended SEQ target. There was high treatment safety as no patient lost two or more lines of CDVA, which is consistent with many of the previous studies [8,[12][13][14][15][16][17][18][19][20][21]. At 12 months postoperatively, 80.8% of patients had a refractive cylinder no greater than 0.50 D and 100% had cylinders no greater [15,19,21,22], but only one study reported fewer than 60% of patients having a refractive cylinder no greater than 1.00 D [19].…”

Section: Discussionsupporting

confidence: 86%

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Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

et al. 2022

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Introduction: Treatment of mixed astigmatism with laser in situ keratomileusis (LASIK) is complex as the correction requires flattening the cornea in one meridian while steepening the cornea in the other meridian. The bitoric technique has become the most popular approach and has been tested across a variety of platforms. This study is the first to evaluate the results of mixed astigmatism treatment using the Allegretto WaveLight Ò EX500. Methods: This study was a single-center, retrospective, noncomparative analysis of 400 eyes that underwent LASIK to correct for mixed astigmatism utilizing the EX500 excimer laser. Data on uncorrected distance visual acuity, corrected distance visual acuity, and spherical equivalent was analyzed at consecutive intervals (1, 3, 6, 9, and 12 months). Refractive measurements were used to perform a vector analysis.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 86%

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

et al. 2022

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Three-year outcomes of mixed astigmatism correction with single-step transepithelial photorefractive keratectomy with a large ablation zone

Kałużny

Verma

Piotrowiak-Słupska

et al. 2021

J Cataract Refract Surg

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Purpose: To evaluate refractive and visual outcomes of single-step transepithelial photorefractive keratectomy (transPRK) in the treatment of mixed astigmatism with the use of an aberration-neutral profile and large ablation zone. Setting: Nicolaus Copernicus University and Oftalmika Eye Hospital, Bydgoszcz, Poland. Design: Retrospective, observational case series. Methods: This study included patients who underwent transPRK to correct mixed astigmatism and completed the 3-year follow-up. Procedures were performed with an Amaris 750S excimer laser using an aberration-neutral profile and optical zone of 7.2 mm or more. Results: A total 48 eyes of 39 patients were included. Preoperatively, mean spherical manifest refraction was +1.37 ± 0.98 diopter (D) (0.25 to 4.00 D), and astigmatism was −4.00 ± 0.76 D (−2.25 to −6.00 D). Three years postsurgery, it was −0.17 ± 0.26 D and −0.41 ± 0.44 D, respectively. Attempted spherical equivalent correction within ±0.50 D was achieved in 45 eyes (94%) and cylindrical correction in 34 (71%). Preoperative corrected distance visual acuity (CDVA) was 20/20 or better in 38 eyes (79%), and postoperative uncorrected was 20/20 or better in 29 eyes (60.0%). No eye had lost 2 or more Snellen lines of CDVA, whereas 3 eyes (6%) gained 2 or more lines. In 4 eyes (8%), haze of low intensity was observed at the periphery, with scores between 0.5 and 1.0, and only 1 eye getting a score of 2 in 0- to 4-degree scale. Conclusions: Mixed astigmatism correction with large-ablation-zone transPRK provided good results for efficacy, safety, predictability, and visual outcomes in a 3-year follow-up.

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Outcomes for Mixed Cylinder LASIK With the MEL 90 ^® Excimer Laser

Reinstein¹,

Carp²,

Archer³

et al. 2018

J Refract Surg

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PURPOSE: To report the outcomes of LASIK for mixed cylinder using the Triple-A ablation profile with the MEL 90 excimer laser (Carl Zeiss Meditec, Jena, Germany). METHODS: This was a retrospective analysis of all eyes treated by LASIK for mixed cylinder using the Triple-A ablation profile with the MEL 90 laser between July 2013 and October 2016. Patients were observed for 1 year after surgery. Standard outcomes analysis and vector analysis by the Alpins method were performed. RESULTS: The database review identified 105 eyes (82 patients) treated by LASIK for mixed cylinder using the MEL 90 laser. Mean age was 40 ± 11 years (range: 18 to 65 years). Mean attempted spherical equivalent was +0.30 ± 0.90 diopters (D) (range: −2.30 to +1.75 D). Mean cylinder was −2.93 ± 1.47 D (range: −0.75 to −7.00 D). Preoperative corrected distance visual acuity (CDVA) was 20/20 or better in 81% of eyes. Postoperative uncorrected distance visual acuity was 20/20 or better in 69% and 20/25 or better in 86% of eyes. Mean postoperative spherical equivalent relative to the intended target was −0.21 ± 0.38 D (range: −1.25 to +1.13 D), with 83% within ±0.50 D. Mean postoperative cylinder was −0.57 ± 0.41 D (range: 0.00 to −1.75 D). Geometric mean was 1.12 for the correction index and 0.25 for the index of success. For angle of error, the arithmetic mean was −0.6° ± 4.2° (range: −13.5° to 9.5°) and the absolute mean was 2.9° ± 3.0° (range: 0.0° to 13.5°). There was loss of one line of CDVA in 3% of eyes and no eyes lost two or more lines CDVA. There was a small increase in contrast sensitivity after surgery at 3, 6, 12, and 18 cycles per degree ( P < .05). CONCLUSIONS: One-year outcomes of LASIK using the MEL 90 laser for mixed cylinder up to −7.00 D demonstrated excellent efficacy, safety, and predictability. Vector analysis found a 12% overcorrection in magnitude of refractive cylinder. Given the high accuracy for angle of error, a nomogram could be applied to reduce the over-correction and further improve the uncorrected distance visual acuity outcomes. [ J Refract Surg. 2018;34(10):672–680.]

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Treatment of mixed astigmatism: early clinical outcomes withWaveLight and Technolas excimer lasers

Abstract: There were no significant differences in refraction and visual acuity between the WaveLight and Technolas groups during a 3-month follow-up period after laser in situ keratomileusis for mixed astigmatism.

Cited by 4 publications

References 17 publications

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

Three-year outcomes of mixed astigmatism correction with single-step transepithelial photorefractive keratectomy with a large ablation zone

Outcomes for Mixed Cylinder LASIK With the MEL 90 ^® Excimer Laser

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Treatment of mixed astigmatism: early clinical outcomes withWaveLight and Technolas excimer lasers

Abstract: There were no significant differences in refraction and visual acuity between the WaveLight and Technolas groups during a 3-month follow-up period after laser in situ keratomileusis for mixed astigmatism.

Cited by 4 publications

References 17 publications

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

Refractive Outcomes After LASIK for the Treatment of Mixed Astigmatism with the Allegretto WaveLight EX500

Three-year outcomes of mixed astigmatism correction with single-step transepithelial photorefractive keratectomy with a large ablation zone

Outcomes for Mixed Cylinder LASIK With the MEL 90 ® Excimer Laser

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Outcomes for Mixed Cylinder LASIK With the MEL 90 ^® Excimer Laser