Simulations of the optics of the Howland crossed-cylinder aberroscope technique show that errors in alignment, data collection, and analysis can lead to unexpected asymmetries of the determined aberrations in a rotationally symmetric system. In particular, coma can be incorrectly indicated. The magnitude of the error in aberration measurement depends on the magnitude of the alignment, data collection, and alignment errors. These findings indicate that the tolerances for setting up the technique and data collection should be analyzed thoroughly before quantitative significance is given to the determined aberration coefficients.
© 1998 Optical Society of America
(080.1010) Geometric optics : Aberrations (global)
(110.3000) Imaging systems : Image quality assessment
(170.4460) Medical optics and biotechnology : Ophthalmic optics and devices
(330.4460) Vision, color, and visual optics : Ophthalmic optics and devices
(330.7310) Vision, color, and visual optics : Vision
George Smith, Raymond A. Applegate, and David A. Atchison, "Assessment of the accuracy of the crossed-cylinder aberroscope technique," J. Opt. Soc. Am. A 15, 2477-2487 (1998)