PURPOSE
To assess the efficacy, predictability, and
safety of LASIK for the surgical correction of low to moderate myopia with
astigmatism using the SCHWIND AMARIS excimer laser.
METHODS
Six international study sites enrolled 358 eyes
with a manifest refraction spherical equivalent (MRSE) from –0.50 to
–7.38 diopters (D) (mean sphere: –3.13±1.58 D) with up to
–5.00 D of astigmatism (mean: –0.69±0.67 D). All eyes
underwent treatment with the nonwavefront-guided aspheric algorithm of the
SCHWIND AMARIS excimer laser. All eyes were targeted for emmetropia. Refractive
outcomes and corneal higher order aberrations were analyzed pre- and
postoperatively. Visual quality was assessed using photopic and mesopic
contrast sensitivity. Six-month postoperative outcomes are reported.
RESULTS
At 6 months postoperative, the MRSE for all
eyes was –0.21±0.20 D, and 96% (343/358) of eyes had MRSE within
±0.50 D. Uncorrected visual acuity was 20/20 or better in 98% (351/358)
of eyes, and no eyes lost 2 or more lines of best spectacle-corrected visual
acuity. The total corneal higher order aberrations root-mean-square increased
by 0.09 µm, spherical aberration increased by 0.08 µm, and coma
increased by 0.04 µm postoperatively. Photopic and mesopic contrast
sensitivity did not change 6 months postoperatively.
CONCLUSIONS
Treatment of myopia with astigmatism using
the SCHWIND AMARIS excimer laser is safe, efficacious, predictable, and
maintains visual quality. [J Refract Surg. 2010;26:88-98.]
doi:10.3928/1081597X-20100121-04
AUTHORS
From Muscat Eye Laser Center, Muscat, Oman (Arbelaez); Emmetropia Mediterranean Eye Institute, Heraklion, Crete, Greece (Aslanides); Clinica Barraquer, Bogotá, Colombia (Barraquer); Centro Oftalmo-Chirurgico Carones, Milano, Italy (Carones); Klinika Oftalmologicka, Lekarske Fakulty Univ. Karlovy, Kralove, Czech Republic (Feuermannova, Rozsival); and Augenklinik am Marienplatz, München, Germany (Neuhann).
The authors have no proprietary interest in the materials presented herein.
Correspondence: Maria Clara Arbelaez, MD, Muscat Eye Laser Center, PO Box 938 PC, 117 Wadi al Kabir, Muscat, Oman. Tel: 96 824 691 414; Fax: 96 824 601 212; E-mail: drmaria@omantel.net.om
Received: May 19, 2008; Accepted: February 10, 2009
Posted online: April 15, 2009
