The SCHWIND AMARIS Total-Tech Laser As An All-Rounder in Refractive Surgery

Overview

Journal Middle East Afr J Ophthalmol

Specialty Ophthalmology

Date 2010 Feb 10

PMID 20142960

Citations 4

Authors

Maria Clara Arbelaez

Samuel Arba Mosquera

Affiliations

Soon will be listed here.

Abstract

Purpose: To describe and argument an overview of the main features and unique technical points of AMARIS Total-Tech Laser, coupled with patient outcomes supporting the decision to perform LASIK treatments with maximised outcomes.

Settings: Dr. M.C. Arbelaez, Muscat Eye Laser Center, Muscat, Sultanate of Oman.

Methods: The findings collected during 18-month experience using SCHWIND AMARIS Total-Tech Laser have been reviewed to provide arguments for supporting the decision to perform LASIK treatments with maximised outcomes. For updated clinical outcomes, the last 100 myopic astigmatism treatments, the last 100 hyperopic astigmatism treatments, the last 30 ocular-wavefront-guided treatments, and the last 30 corneal-wavefront-guided treatments, all with 6-month follow-up, were included. For all those, LDV femtosecond system was used to prepare the flaps, and AMARIS flying spot system was used to perform ablations. Clinical outcomes were evaluated in terms of predictability, refractive outcome, safety, wavefront aberration, and contrast sensitivity.

Results: 6-month postoperatively, mean defocus was -0.14+/-0.31D and astigmatism 0.25+/-0.37D. 70+/- eyes were within +/-0.25D of emmetropia. 43+/- eyes gained lines of best spectacle-corrected visual acuity. For Aberration-Free treatments, none of the aberration metrics changed from pre- to postoperative values in a clinically relevant amount. For ocular-wavefront-guided treatments, the surgery did not change coma or spherical aberration, and reduced trefoil (p<0.005). For corneal-wavefront-guided treatments, the trefoil, coma, and spherical aberrations, as well as the total root-mean-square values of higher order aberration, were significantly reduced (p<.05) when the pre-existing aberrations were greater than the repeatability and the biological noise.

Conclusions: Although this review does not allow for evidence-based conclusions, following our strategy, LASIK results were excellent. LASIK surgery with AMARIS system yield excellent outcomes. Refractions were reduced to subclinical values with no induction of High-Order-Aberrations. Neither adverse events nor complications were observed.

Citing Articles

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.

Brar S, Rathod D, Roopashree C, Ganesh S J Ophthalmol. 2021; 2021:9929181.

PMID: 34258051 PMC: 8257363. DOI: 10.1155/2021/9929181.

Corneal curvature, asphericity, and aberrations after transepithelial photorefractive keratectomy and femtosecond laser-assisted keratomileusis for myopia: A prospective comparative study.

Zhang Y, Xu X, Cao L, Liu L Indian J Ophthalmol. 2020; 68(12):2945-2949.

PMID: 33229675 PMC: 7856998. DOI: 10.4103/ijo.IJO_1106_20.

High-speed recording of thermal load during laser trans-epithelial corneal refractive surgery using a 750Hz ablation system.

de Ortueta D, Arba-Mosquera S, Magnago T J Optom. 2018; 12(2):84-91.

PMID: 30037645 PMC: 6449765. DOI: 10.1016/j.optom.2018.05.002.

Excimer laser 6(th) generation: state of the art and refractive surgical outcomes.

El Bahrawy M, Alio J Eye Vis (Lond). 2015; 2:6.

PMID: 26605362 PMC: 4655460. DOI: 10.1186/s40662-015-0015-5.

References

Brint S . Higher order aberrations after LASIK for myopia with alcon and wavelight lasers: a prospective randomized trial. J Refract Surg. 2005; 21(6):S799-803. DOI: 10.3928/1081-597X-20051101-30. View

Yoon G, MacRae S, Williams D, Cox I . Causes of spherical aberration induced by laser refractive surgery. J Cataract Refract Surg. 2005; 31(1):127-35. DOI: 10.1016/j.jcrs.2004.10.046. View

Atchison D, Markwell E, Kasthurirangan S, Pope J, Smith G, Swann P . Age-related changes in optical and biometric characteristics of emmetropic eyes. J Vis. 2008; 8(4):29.1-20. DOI: 10.1167/8.4.29. View

Roberts C . Biomechanics of the cornea and wavefront-guided laser refractive surgery. J Refract Surg. 2002; 18(5):S589-92. DOI: 10.3928/1081-597X-20020901-18. View

Mrochen M, Donitzky C, Wullner C, Loffler J . Wavefront-optimized ablation profiles: theoretical background. J Cataract Refract Surg. 2004; 30(4):775-85. DOI: 10.1016/j.jcrs.2004.01.026. View

Bueeler M, Mrochen M . Simulation of eye-tracker latency, spot size, and ablation pulse depth on the correction of higher order wavefront aberrations with scanning spot laser systems. J Refract Surg. 2005; 21(1):28-36. DOI: 10.3928/1081-597X-20050101-08. View

Llorente L, Barbero S, Merayo J, Marcos S . Total and corneal optical aberrations induced by laser in situ keratomileusis for hyperopia. J Refract Surg. 2004; 20(3):203-16. DOI: 10.3928/1081-597X-20040501-03. View

Huang D, Tang M, Shekhar R . Mathematical model of corneal surface smoothing after laser refractive surgery. Am J Ophthalmol. 2003; 135(3):267-78. DOI: 10.1016/s0002-9394(02)01942-6. View

Mastropasqua L, Nubile M, Ciancaglini M, Toto L, Ballone E . Prospective randomized comparison of wavefront-guided and conventional photorefractive keratectomy for myopia with the meditec MEL 70 laser. J Refract Surg. 2004; 20(5):422-31. DOI: 10.3928/1081-597X-20040901-03. View

10.

Amoils S . Using a Nidek excimer laser with a rotary epithelial brush and corneal chilling: clinical results. J Cataract Refract Surg. 1999; 25(10):1321-6. DOI: 10.1016/s0886-3350(99)00198-4. View

11.

Guirao A, Williams D, MacRae S . Effect of beam size on the expected benefit of customized laser refractive surgery. J Refract Surg. 2003; 19(1):15-23. DOI: 10.3928/1081-597X-20030101-04. View

12.

Kim W, Jo J . Corneal hydration affects ablation during laser in situ keratomileusis surgery. Cornea. 2001; 20(4):394-7. DOI: 10.1097/00003226-200105000-00011. View

13.

Subbaram M, MacRae S . Customized LASIK treatment for myopia based on preoperative manifest refraction and higher order aberrometry: the Rochester nomogram. J Refract Surg. 2007; 23(5):435-41. DOI: 10.3928/1081-597X-20070501-03. View

14.

Munnerlyn C, Koons S, Marshall J . Photorefractive keratectomy: a technique for laser refractive surgery. J Cataract Refract Surg. 1988; 14(1):46-52. DOI: 10.1016/s0886-3350(88)80063-4. View

15.

Buhren J, Yoon G, Kenner S, MacRae S, Huxlin K . The effect of optical zone decentration on lower- and higher-order aberrations after photorefractive keratectomy in a cat model. Invest Ophthalmol Vis Sci. 2007; 48(12):5806-14. PMC: 2815350. DOI: 10.1167/iovs.07-0661. View

16.

Stonecipher K, Kezirian G . Wavefront-optimized versus wavefront-guided LASIK for myopic astigmatism with the ALLEGRETTO WAVE: three-month results of a prospective FDA trial. J Refract Surg. 2008; 24(4):S424-30. DOI: 10.3928/1081597X-20080401-20. View

17.

Radhakrishnan H, Charman W . Age-related changes in ocular aberrations with accommodation. J Vis. 2007; 7(7):11.1-21. DOI: 10.1167/7.7.11. View

18.

Benito A, Redondo M, Artal P . Laser in situ keratomileusis disrupts the aberration compensation mechanism of the human eye. Am J Ophthalmol. 2008; 147(3):424-431.e1. DOI: 10.1016/j.ajo.2008.09.027. View

19.

McLellan J, Marcos S, Prieto P, Burns S . Imperfect optics may be the eye's defence against chromatic blur. Nature. 2002; 417(6885):174-6. DOI: 10.1038/417174a. View

20.

Iida Y, Shimizu K, Ito M, Suzuki M . Influence of age on ocular wavefront aberration changes with accommodation. J Refract Surg. 2008; 24(7):696-701. DOI: 10.3928/1081597X-20080901-09. View