everything! well almost, yes one can experience entopic vision phenomena in absolute darkness by stimulating the photo receptors, ganglion cells etc. read more
Sight and vision are important because they allow us to connect with our surroundings, keep us safe, and help maintain the sharpness of our minds. Sight and vision are different entities. Sight is physical – it is a sensory experience in which light reflects off of shapes and objects and the eyes then focus this light. read more
Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment. The resulting perception is also known as visual perception, eyesight, sight, or vision (adjectival form: visual, optical, or ocular). read more
Formerly seeing people who have lost their sight because of illness or an accident can remember colours for the rest of their lives. People who have been blind from birth have no proper idea of colours, but they still understand the meaning of light and dark, of bright and dull. read more