Recent studies have indicated that an increasing number of humans are experiencing refractive visual aberrations. Typically, humans correct optical aberrations by wearing eyeglasses, contact lenses, or undergoing refractive surgeries, but these methods have downsides. Eyeglasses and contact lenses are often inconvenient or uncomfortable for constant usage, and the latter can additionally cause irritation and infection due to surface contact. Refractive surgeries carry the risk of severe side effects such as blurred distance vision and dry eyes. These traditional correcting methods also have limited capability of correcting higher-order aberrations, including coma and spherical aberrations. Due to these drawbacks, we propose a computational solution that modifies the optics of electronic displays for correcting refractive visual aberrations. Our solution is safe with no direct contact with the eye. It improves the image pre-distortion architecture proposed by Huang et al. [17] that sends a sharp image without distortion to the focal range of the viewer by displaying a light field in front. The light field display and pre-distortion algorithm are constructed with a microlens array to eliminate the brightness loss and diffraction of the pinhole aperture array in prior work. The chromatic artifacts are erased by multi-sampling within the primary light emitting diodes in the pixels of the display panel. A preprocessing image quality enhancement method is proposed and significantly improves the perceptual experience according to the HDR-VDP2 image quality evaluation. Finally, we implement the application of the light field vision correcting method to a low-cost virtual reality head-mounted display using Google Cardboard.




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