This course examines the optics of the eye and the optical factors of the visual system. The course will concentrate on examining the optical quality of the eye and the measurement of vision and ocular characteristics. It will provide a comprehensive review of the human eye optics and will cover the refractive mechanism, the dioptics of the eye, including its aberrations and schematics eyes, the mechanism of accommodation and pupillary contraction, as well as the retinal image quality and intraocular scatter measurement.