Determination of Corneal and Ocular Aberrations with Corneal Topography and Wavefront Aberrometry
Jahnke M., Wirbelauer C., Häberle H., Pham D. T.
Dept. of Ophthalmology, Vivantes Klinikum Neukölln, Berlin
Purpose: Currently the influence of corneal and ocular aberrations is insufficiently known. The purpose of this study was to compare coma and spherical aberrations with corneal topography and wavefront aberrometry.
Method: In a prospective clinical study 98 eyes of 49 consecutive patients ranging from 17 to 65 years and without pathologies were included. The best-corrected visual acuity ranged from 0,8 to 1,6. 48 eyes were emmetropic (SE ±0,5 D), 42 eyes were myopic (SE <-0,5 to -6,75 D), and 8 eyes were hyperopic (SE >+0,5 to +3,88 D). The corneal aberrations were derived from the height values of placido disc-based corneal topography (Keratron Scout, Optikon). The measurement of the total ocular aberrations was performed in mydriasis (6,5 mm pupil) with a wavefront aberrometer based on the Tscherning principle (ORK, Schwind). Coma and spherical aberrations were determined with the Zernike coefficients (1. to 4. order).<
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