Bitoric Results for Mixed
and High Myopic Astigmatism with Nidek EC-5000 Excimer Laser
Anun Vongthongsri, M.D.
Kanitta Tantisirisomboon, M.D.1
Prut Hanutsaha, M.D.1
Pichit Nariptaphan, M.D.
ABSTRACT Purpose : To
evaluate the efficacy, predictability and safety of bitoric LASIK ablation
for mixed and high myopic astigmatism.
Methods : LASIK was performed on 20 eyes of 17 patients for correction of mixed and
high myopic astigmatism with manifest cylinder from -1.75 to -6.00 D (mean
-3.28 ± 1.45 D). A bitoric LASIK ablation was performed using the Nidek
EC-5000 excimer laser.
Main outcome
measure : Uncorrected visual acuity, manifest
refraction and best corrected visual acuity were the parameter measured
preoperatively and at 1, 3, 6 and 12 months postoperatively.
Results : Refactive astigmatism was reduced to a mean of -0.53 ± 0.37 (range
-1.25 to 0.50 D). Uncorrected visual acuity was 20/40 or better in 95% of
the eyes. 80% of the eyes achieved an uncorrected visual acuity of 20/25
or better. There was no loss of best spectacle corrected visual acuity more
than 2 lines.
Conclusions
: Bitoric LASIK ablation is an effective procedure
to correct mixed and high myopic astigmatism. The results were predictable.
It is a safe procedure, no any eyes lost best spectacle corrected visual
acuity postoperatively.
Thai
J Ophthalmol 2000 ; July-December 14(2) : 133-143.
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