[Photoastigmatic refractive keratectomy for low, moderate, and high astigmatism using a broad beam excimer laser: evaluataion according to new international criteria]. / Photoastigmatische refraktive Keratektomie für gering-, mittel- und hochgradig myope Astigmatismen mit einem Broad Beam Excimer Laser: Auswertung refraktiv-chirurgischer Daten nach internationalen Richtlinien.
Klin Monbl Augenheilkd
; 215(5): 267-74, 1999 Nov.
Article
em De
| MEDLINE
| ID: mdl-10609240
ABSTRACT
BACKGROUND:
Photorefractive keratectomy (PRK) is an accepted procedure to correct myopia in Germany. The purpose of this study was to evaluate photoastigmatic refractive keratectomy (PARK) for myopic astigmatism. MATERIAL ANDMETHODS:
PARK using the VISX 20/20 excimer laser was performed in 50 eyes of 36 patients (25 female, 16 male) aged 22 to 68 years (mean 38 +/- 10 years) in the period of 1995 to 1996. Retrospective evaluation was done after dividing the patients into three astigmatic groups between -0.5 diopters (D) and -1.5 D (group I, n = 28), between -1.75 D and -3.0 D (group II, n = 16) und between -3.25 D and -5.5 D (group III, n = 6). The correction of myopic astigmatism was assessed concerning the criteria safety, efficacy, predictability and stability. Mean follow-up was 12 months (8-15 months).RESULTS:
Seventy-eight % of all eyes achieved an uncorrected visual acuity of > 0.5. Sixty-eight % of the eyes were within +/- 1.0 D of the desired correction. Loss of 2 or more lines of best corrected visual acuity occurred in 6 eyes (12.0%). We observed in group I an astigmatic reduction of 36.0%, in group II of 66.5% and in group III of 68.0%. The surgically induced astigmatism was calculated with 1.29 +/- 1.0 D. Mean axis rotation of the refractive cylinder was 22.12 +/- 23.05 degrees.CONCLUSIONS:
PARK using the VISX 20/20 excimer laser is an acceptable procedure to correct myopic astigmatism. However, the study revealed that astigmatic reduction with a broad beam laser is not yet perfect in terms of efficacy, predictability and safety.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Astigmatismo
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Ceratectomia Fotorrefrativa
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Córnea
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Miopia
Tipo de estudo:
Etiology_studies
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Observational_studies
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Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
De
Ano de publicação:
1999
Tipo de documento:
Article