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T Kuroda, T Fujikado, N Maeda, S Ninomiya, Y Tano, Y Hirohara, T Mihashi; The Effect of Scattering and Higher-order Aberrations on Contrast Sensitivity in Eyes With Cataract . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2033.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Visual quality is affected by light scattering or wavefront aberrations in eyes with cataract. The purpose of this study is to estimate the effect of scattering and higher-order aberrations on contrast sensitivity in eyes with cataract. Methods: Hartmann-Shack sensor (Wavefront analyzer, Topcon, Tokyo, Japan) has been used to measure 27 eyes of 24 cataract patients without any retinal abnormalities and 12 eyes of 12 normal subjects. Ocular-higher-order wavefront aberrations (OWA) and scatter index (SI) for central 4mm diameter were measured. Higher-order aberrations were calculated with Zernike polynomials up to 4th order. The amount of the scattering was estimated by using the width of the point spread functions (PSFs) in the Hartmann image. The width was compensated by the aberrations. The area under the log contrast sensitivity function (AULCSF) was measured by CSV-1000 (Vector vision). Multiple linear regression analysis was performed to investigate the effect of OWA and SI on AULCSF. Results: AULCSF was approximated by using SI and OWA; AULCSF=7.089-0.03305x SI - 4.671x OWA (Multiple Linear Regression, P=0.001). Conclusion: Using Hartmann-Shack sensor, the amount of contrast sensitivity in eyes with cataract can be estimated from the scattering index and the wavefront aberrations.
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