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T. Hiraoka, T. Itoga, N. Sakata, F. Okamoto, T. Oshika; Contrast Sensitivity Function and Higher–Order Wavefront Aberrations Before and After Nd:YAG Laser Capsulotomy for Liquefied After–Cataract . Invest. Ophthalmol. Vis. Sci. 2005;46(13):1996.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To prospectively investigate changes in contrast sensitivity function and ocular higher–order wavefront aberrations by Nd:YAG laser capsulotomy for liquefied after–cataract. Methods: Subjects were six eyes of 6 patients who had liquefied after–cataract with complaint of blurred vision. Mean age was 79.3 ± 2.5 years (range 76 to 82). We examined 100% contrast visual acuity, contrast sensitivity, and 10% low contrast visual acuity with the Vector Vision CSV–1000. From the contrast sensitivity data, area under the log contrast sensitivity function (AULCSF) was calculated. Ocular higher–order aberrations were measured for a 4–mm pupil using the Hartmann–Shack wavefront analyzer (Topcon KR–9000PW). The root mean square (RMS) of the third– and fourth–order Zernike coefficients was used to represent coma– and spherical–like aberrations, respectively. All eyes were evaluated before, 1 week, and 1 month after the procedure. Results: Nd:YAG laser capsulotomy significantly improved AULCSF one week after the procedure (P=0.035, paired t–test) and 10% low contrast visual acuity one month after the treatment (P=0.041). There were no significant changes in 100% contrast visual acuity. Coma– and spherical–like aberrations did not change significantly by the laser procedure. No significant changes were found in vertical coma (C[3,–1]), horizontal coma (C[3,1]), and spherical aberration (C[4,0]). Conclusions: Laser treatment for liquefied after–cataract significantly improved contrast sensitivity, but 100% contrast visual acuity and ocular higher–order aberration did not show significant changes by the laser procedure.
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