[Photorefractive/photo-astigmatic refractive keratectomy in low myopia and myopic astigmatism. Broad beam versus scanning spot laser technology].
OBJECTIVE
The results of photorefractive/photoastigmatic refractive keratectomy (PRK/PARK) were compared between two patient groups treated consecutively with either broad-beam or scanning-spot technology.


METHODS
PRK/PARK was performed with a broad-beam excimer laser VISX 20/20 in 46 eyes and with the scanning-spot laser system Keracor 217 in 49 eyes. Preoperative spherical equivalent (subjective manifest refraction) was < or =-6.0 diopter in both groups. Safety, efficacy, predictability, stability, and complications were investigated after 1,4 and 12, months postoperatively.


RESULTS
In the broad-beam laser group no eye lost two or more lines of best-corrected visual acuity;in the scanning-spot laser group one eye lost two lines 12 months postoperatively. Efficacy, predictability, and stability were comparable between the two groups.


CONCLUSIONS
Both the broad-beam and the scanning-spot laser provided good results after PRK/PARK for low myopia and myopic astigmatism. This study found no fundamental differences between the two laser systems.
Steinkamp
G W
GW
Johann Wolfgang Goethe-Universität, Zentrum für Augenheilkunde, Frankfurt am Main.
Wellermann
G
G
Schnitzler
E M
EM
Baumeister
M
M
Ohrloff
C
C
Kohnen
T
T
D000328:Adult; D001251:Astigmatism / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy / Q000295:instrumentation*; D012029:Refraction, Ocular; D016896:Treatment Outcome
Photorefraktive/photoastigmatisch-refraktive Keratektomie bei niedriger Myopie und myopem Astigmatismus. Broad-beam versus Scanning-spot-Lasertechnologie.