LASIK versus photorefractive keratectomy for high myopic (> 3 diopter) astigmatism
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LASIK versus photorefractive keratectomy for high myopic (> 3 diopter) astigmatism. / Katz, Toam; Wagenfeld, Lars; Galambos, Peter; Darrelmann, Benedikt Große; Richard, Gisbert; Linke, Stephan Johannes.
in: J REFRACT SURG, Jahrgang 29, Nr. 12, 01.12.2013, S. 824-31.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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T1 - LASIK versus photorefractive keratectomy for high myopic (> 3 diopter) astigmatism
AU - Katz, Toam
AU - Wagenfeld, Lars
AU - Galambos, Peter
AU - Darrelmann, Benedikt Große
AU - Richard, Gisbert
AU - Linke, Stephan Johannes
N1 - Copyright 2013, SLACK Incorporated.
PY - 2013/12/1
Y1 - 2013/12/1
N2 - PURPOSE: To compare the efficacy, safety, predictability, and vector analysis indices of LASIK and photorefractive keratectomy (PRK) for correction of high cylinder of greater than 3 diopters (D) in myopic eyes.METHODS: The efficacy, safety, and predictability of LASIK or PRK performed in 114 consecutive randomly selected myopic eyes with an astigmatism of greater than 3 D were retrospectively analyzed at the 2- to 6-month follow-up visits. Vector analysis of the cylindrical correction was compared between the treatment groups.RESULTS: A total of 57 eyes receiving PRK and 57 eyes receiving LASIK of 114 refractive surgery candidates were enrolled in the study. No statistically significant difference in efficacy [efficacy index = 0.76 (±0.32) for PRK vs 0.74 (±0.19) for LASIK (P = .82)], safety [safety index = 1.10 (±0.26) for PRK vs 1.01 (±0.17) for LASIK (P = .121)], or predictability [achieved astigmatism < 1 D in 39% of PRK- and 54% of LASIK-treated eyes, and < 2 D in 88% of PRK- and 89% of LASIK-treated eyes (P = .218)] was demonstrated. Using Alpins vector analysis, the surgically induced astigmatism and difference vector were not significantly different between the surgery methods, whereas the correction index showed a slight and significant advantage of LASIK over PRK (1.25 for PRK and 1.06 for LASIK, P < .001).CONCLUSIONS: LASIK and PRK are comparably safe, effective, and predictable procedures for excimer laser correction of high astigmatism of greater than 3 D in myopic eyes. Predictability of the correction of the cylindrical component is lower than that of the spherical equivalent.
AB - PURPOSE: To compare the efficacy, safety, predictability, and vector analysis indices of LASIK and photorefractive keratectomy (PRK) for correction of high cylinder of greater than 3 diopters (D) in myopic eyes.METHODS: The efficacy, safety, and predictability of LASIK or PRK performed in 114 consecutive randomly selected myopic eyes with an astigmatism of greater than 3 D were retrospectively analyzed at the 2- to 6-month follow-up visits. Vector analysis of the cylindrical correction was compared between the treatment groups.RESULTS: A total of 57 eyes receiving PRK and 57 eyes receiving LASIK of 114 refractive surgery candidates were enrolled in the study. No statistically significant difference in efficacy [efficacy index = 0.76 (±0.32) for PRK vs 0.74 (±0.19) for LASIK (P = .82)], safety [safety index = 1.10 (±0.26) for PRK vs 1.01 (±0.17) for LASIK (P = .121)], or predictability [achieved astigmatism < 1 D in 39% of PRK- and 54% of LASIK-treated eyes, and < 2 D in 88% of PRK- and 89% of LASIK-treated eyes (P = .218)] was demonstrated. Using Alpins vector analysis, the surgically induced astigmatism and difference vector were not significantly different between the surgery methods, whereas the correction index showed a slight and significant advantage of LASIK over PRK (1.25 for PRK and 1.06 for LASIK, P < .001).CONCLUSIONS: LASIK and PRK are comparably safe, effective, and predictable procedures for excimer laser correction of high astigmatism of greater than 3 D in myopic eyes. Predictability of the correction of the cylindrical component is lower than that of the spherical equivalent.
KW - Adult
KW - Astigmatism
KW - Case-Control Studies
KW - Corneal Stroma
KW - Female
KW - Follow-Up Studies
KW - Humans
KW - Keratomileusis, Laser In Situ
KW - Lasers, Excimer
KW - Male
KW - Middle Aged
KW - Myopia, Degenerative
KW - Photorefractive Keratectomy
KW - Retrospective Studies
KW - Surgical Flaps
KW - Treatment Outcome
KW - Visual Acuity
KW - Young Adult
U2 - 10.3928/1081597X-20131029-03
DO - 10.3928/1081597X-20131029-03
M3 - SCORING: Journal article
C2 - 24202704
VL - 29
SP - 824
EP - 831
JO - J REFRACT SURG
JF - J REFRACT SURG
SN - 1081-597X
IS - 12
ER -