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. 2021 Jun 25:2021:9929181.
doi: 10.1155/2021/9929181. eCollection 2021.

One-Year Visual and Refractive Outcomes following LASIK for Myopia and Myopic Astigmatism with MEL 90 versus Schwind Amaris 750S Excimer Laser: A Comparative Study

Sheetal Brar  1 , Dishitha P Rathod  1 , C R Roopashree  1 , Sri Ganesh  1
Affiliations

One-Year Visual and Refractive Outcomes following LASIK for Myopia and Myopic Astigmatism with MEL 90 versus Schwind Amaris 750S Excimer Laser: A Comparative Study

Sheetal Brar et al. J Ophthalmol. .

Abstract

Purpose: To compare clinical outcomes following LASIK for myopia performed with MEL 90 vs. Schwind Amaris 750S excimer laser.

Methods: Data were collected retrospectively for patients who underwent Femto-LASIK, using the MEL 90 and Schwind Amaris 750S excimer laser for correction of myopia and myopic astigmatism within the range of -1.00 to -10.00 D SE from January 2013 till June 2018. Outcomes were analysed at 12 months for safety, efficacy, enhancement rate, and long-term complications.

Results: A total of 328 eyes of 328 patients were analysed. One hundred and sixty-three eyes were treated with Schwind Amaris and the remaining 165 eyes with the MEL 90 laser. Twelve months postoperatively, the mean UDVA, CDVA, residual SE, and cylinder in the Amaris group were -0.10 ± 0.09 logMAR, -0.14 ± 0.06 logMAR, -0.21 ± 0.22 D, -0.13 ± 0.18 D versus -0.05 ± 0.07 logMAR, -0.09 ± 0.08 logMAR, -0.23 ± 0.23 D, and -0.14 ± 0.21 D for the MEL 90 group (p values >0.05). For the Amaris group, safety and efficacy indices were 1.12 and 1.02, whereas for the MEL 90 group, these indices were 1.08 and 1.00, respectively. No eye in either group had any postop flap-related complications, infectious keratitis, diffuse lamellar keratitis, or keratectasia. Two eyes in the Amaris and 4 eyes in MEL 90 group required enhancement for the progression of myopia.

Conclusion: At 12 months, both Schwind Amaris 750S and MEL 90 lasers demonstrated comparable clinical outcomes for myopic LASIK in a single surgeon setting.

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Conflict of interest statement

Dr. Sri Ganesh and Dr. Sheetal Brar are consultants to Carl Zeiss Meditec. The other authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
Spherical equivalent refraction accuracy of both groups at 12 months.
Figure 2
Figure 2
Attempted vs. achieved spherical equivalent refraction of both groups at 12 months.
Figure 3
Figure 3
Safety (postop CDVA/preop CDVA) of both study groups at 12 months.
Figure 4
Figure 4
Uncorrected visual acuity vs. corrected visual acuity for both study groups at 12 months.
Figure 5
Figure 5
Cumulative uncorrected visual acuity of both study groups at 12 months.
Figure 6
Figure 6
Refractive astigmatism distribution of both study groups at 12 months.
Figure 7
Figure 7
Target-induced astigmatism (TIA) vs. surgically induced astigmatism (SIA) for both study groups at 12 months.
Figure 8
Figure 8
Refractive astigmatism angle or error distribution for both study groups at 12 months.
Figure 9
Figure 9
Stability of postoperative SE refraction at 1, 6, and 12 months for both study groups.
See this image and copyright information in PMC

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