Ocular residual astigmatism: effects of demographic and ocular parameters in myopic laser in situ keratomileusis
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Ocular residual astigmatism: effects of demographic and ocular parameters in myopic laser in situ keratomileusis. / Frings, Andreas; Katz, Toam; Steinberg, Johannes; Druchkiv, Vasyl; Richard, Gisbert; Linke, Stephan J.
In: J CATARACT REFR SURG, Vol. 40, No. 2, 2014, p. 232-8.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Ocular residual astigmatism: effects of demographic and ocular parameters in myopic laser in situ keratomileusis
AU - Frings, Andreas
AU - Katz, Toam
AU - Steinberg, Johannes
AU - Druchkiv, Vasyl
AU - Richard, Gisbert
AU - Linke, Stephan J
N1 - Copyright © 2014 ASCRS and ESCRS. Published by Elsevier Inc. All rights reserved.
PY - 2014
Y1 - 2014
N2 - PURPOSE: To analyze the influence of demographic and ocular factors on ocular residual astigmatism (ORA) in myopic laser in situ keratomileusis (LASIK).SETTING: University Medical Center Hamburg-Eppendorf, Hamburg, Germany.DESIGN: Retrospective cross-sectional data analysis.METHODS: Eyes of consecutive myopic patients scheduled for LASIK were studied to evaluate the influence on preexisting ORA of age, sex, ocular dominance, subjective cylinder and topographic astigmatism, subjective sphere, and mesopic pupil size. The ORA was determined using Alpins vector analysis. Two subgroups, defined by the ratio of ORA to preoperative refractive cylinder (R), were formed: ORA:R ≥ 1.0 and ORA:R <1.0).RESULTS: The study comprised 2991 eyes (2991 patients). The mean ORA was 0.75 diopter (D) ± 0.39 (SD) (range 0.00 to 2.00 D); 1372 (46%) eyes had ORA of 1.00 D or more. Ordinary least square estimations and odds ratios showed that subjective sphere, male sex, and dominant eye were negative predictors of the degree of preoperative ORA, while increasing age and larger mesopic pupils did not indicate ORA orientation. With-the-rule astigmatism meridian was more likely in eyes with low ORA, while oblique and against-the-rule meridians were related to high ORA.CONCLUSIONS: The preoperative assessment of refractive surgery candidates should consider the interaction between topographic, refractive, and ORA because corneal refractive surgery is more successful in eyes in which the cylinder mainly originates from the anterior cornea. The current data can help identify patients at high risk for having a significant difference between subjective cylinder and topographic astigmatism.FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
AB - PURPOSE: To analyze the influence of demographic and ocular factors on ocular residual astigmatism (ORA) in myopic laser in situ keratomileusis (LASIK).SETTING: University Medical Center Hamburg-Eppendorf, Hamburg, Germany.DESIGN: Retrospective cross-sectional data analysis.METHODS: Eyes of consecutive myopic patients scheduled for LASIK were studied to evaluate the influence on preexisting ORA of age, sex, ocular dominance, subjective cylinder and topographic astigmatism, subjective sphere, and mesopic pupil size. The ORA was determined using Alpins vector analysis. Two subgroups, defined by the ratio of ORA to preoperative refractive cylinder (R), were formed: ORA:R ≥ 1.0 and ORA:R <1.0).RESULTS: The study comprised 2991 eyes (2991 patients). The mean ORA was 0.75 diopter (D) ± 0.39 (SD) (range 0.00 to 2.00 D); 1372 (46%) eyes had ORA of 1.00 D or more. Ordinary least square estimations and odds ratios showed that subjective sphere, male sex, and dominant eye were negative predictors of the degree of preoperative ORA, while increasing age and larger mesopic pupils did not indicate ORA orientation. With-the-rule astigmatism meridian was more likely in eyes with low ORA, while oblique and against-the-rule meridians were related to high ORA.CONCLUSIONS: The preoperative assessment of refractive surgery candidates should consider the interaction between topographic, refractive, and ORA because corneal refractive surgery is more successful in eyes in which the cylinder mainly originates from the anterior cornea. The current data can help identify patients at high risk for having a significant difference between subjective cylinder and topographic astigmatism.FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
U2 - 10.1016/j.jcrs.2013.11.015
DO - 10.1016/j.jcrs.2013.11.015
M3 - SCORING: Journal article
C2 - 24333012
VL - 40
SP - 232
EP - 238
JO - J CATARACT REFR SURG
JF - J CATARACT REFR SURG
SN - 0886-3350
IS - 2
ER -