A DOUBLE PASS DEVICE FOR RETINAL-IMAGE QUALITY MEASUREMENT

摘要

An optical system for measuring retinal-image quality has a light system constructed and arranged to provide light to be directed onto a retina of a subject's eye, a detection system arranged to receive at least a portion of the light after being reflected or scattered back from the retina of the subject's eye, and an afocal optical system arranged in an optical path of the light between the light system and the detection system. The afocal optical system is constructed and arranged to correct a refractive error of the subject's eye.