Perception: the processing of sensory information in such a way that it produces conscious experiences and guides action in the world. Visual agnosia: an inability to identify objects visually even though they can be identified using other senses (e. g. touch) Visual perception involves the processing of information conveyed by light energy that enters the eye. Light enters the eye through the cornea: outer tissue of the eye (against which contact lenses are placed) After passing through the cornea, the light makes its way through the pupil: adjusted in size by the iris is the black portion of the eye. The iris: tissue that surrounds the pupil and is responsible for the distinct color of the eye lens: light is then refracted by the lens. Memory trace: the trace that an experience leaves behind in memory e. g. recognizing the letter a. Hoffding function: the process whereby an experience makes contact with a memory trace, resulting in recognition.