1. Photoreception is the ability to detect light and involves photoreceptors like rods and cones that contain photopigments. 2. In the eye, light is refracted by the cornea and lens to form an image on the retina, with the fovea providing the sharpest vision. 3. Signals from photoreceptors are processed in the retina and optic nerve before reaching the visual cortex of the brain for interpretation.