![]() Corneal topographic centers were displaced from aberrometer pupil centers by 0.32 ± 0.19 mm nasally and 0.02 ± 0.16 mm inferiorly disregarding corneal decentration relative to pupil center was significant for oblique astigmatism, horizontal coma, and horizontal trefoil. Anterior corneal aberrations were approximately three times higher than posterior corneal aberrations and usually had opposite signs. Most correlations between lenticular and ocular parameters were positive and significant, with compensation of total corneal aberrations by lenticular aberrations for 5/12 coefficients. Theoretical raytracing investigated influence of object distance on aberrations.Īpart from defocus, the highest aberration coefficients were horizontal astigmatism, horizontal coma, and spherical aberration. ![]() Lenticular contributions were given as differences between ocular and corneal aberrations. Raytracing through models of corneas provided total corneal and surface component aberrations for 5-mm-diameter pupils. ![]() Anterior and posterior corneal topographies were obtained with an Oculus Pentacam, and ocular aberrations were obtained with an iTrace aberrometer. There were 61 healthy participants with ages ranging from 20 to 55 years and refractions −8.25 diopters (D) to +3.25 D. To determine the corneal surfaces and lens contributions to ocular aberrations. ![]()
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