Ocular Optical Aberrations After Photorefractive Keratectomy for Myopia and Myopic Astigmatism

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Abstract
ON THE BASIS of the mosaic structure of the retina, the visual acuity (VA) of the human eye could be 20/10 or better. "Subpixel" image processing in the inner retina should even increase VA; however, such good acuity is rarely obtained. Two optical conditions account for this reduction in VA: diffraction originating from the entrance pupil and monochromatic aberrations of the optic apparatus of the eye.1