Seiler T, Reckmann W, Maloney R K
Universitätsaugenklinik im Klinikum Rudolf Virchow Freie Universität, Berlin, Germany.
J Cataract Refract Surg. 1993;19 Suppl:155-65. doi: 10.1016/s0886-3350(13)80400-2.
Following excimer laser photorefractive keratectomy and other refractive surgical procedures, complaints of halos, glare, and monocular diplopia are common. These procedures increase the asphericity of the cornea, which may cause the optical distortions. We used ray tracing techniques to estimate the longitudinal monochromatic aberration of the cornea from the measured corneal topography (effective spherical aberration) in 15 normal eyes with varying degrees of astigmatism and in ten eyes after photorefractive keratectomy. Best spherical corrected visual acuity in the astigmatic eyes was highly correlated with effective spherical aberration (r = -0.9527, P < .001). In the eyes that had photorefractive keratectomy, the effective spherical aberration was highly correlated with measured glare visual acuity (r = 0.875, P < .002). These results suggest that effective spherical aberration is a valuable topographic measure that provides information about the optical performance of aspheric corneas.
在准分子激光屈光性角膜切削术及其他屈光手术之后，光晕、眩光和单眼复视等主诉很常见。这些手术增加了角膜的非球面性，这可能会导致光学畸变。我们使用光线追踪技术，根据测量的角膜地形图（有效球差）来估计15只具有不同程度散光的正常眼睛以及10只接受屈光性角膜切削术后眼睛的角膜纵向单色像差。散光眼中最佳球面矫正视力与有效球差高度相关（r = -0.9527，P <.001）。在接受屈光性角膜切削术的眼睛中，有效球差与测量的眩光视力高度相关（r = 0.875，P <.002）。这些结果表明，有效球差是一种有价值的地形图测量指标，可提供有关非球面角膜光学性能的信息。
