Seeing Flashcards
Accommodation
Helps determine depth.
Beta effect
The perception of motion that occurs when different images are presented next to each other in succession
Binocular depth cues
Depth cues that are created by retinal image disparity — that is, the space between our eyes — and which thus require the coordination of both eyes
Blind spot
A hole in our vision because there are no photoreceptor cells at the place where the optic nerve leaves the retina
Colour blindness
The inability to detect green and/or red colours
Cones
Visual neurons that are specialized in detecting fine detail and colours
Convergence
The inward turning of our eyes that is required to focus on objects that are less than about 50 feet away from us
Cornea
A clear covering that protects the eye and begins to focus the incoming light
Depth cues
Messages from our bodies and the external environment that supply us with information about space and distance.
Electromagnetic energy
Pulses of energy waves that can carry information from place to place
Farsighted
When the focus is behind the retina
Feature detector neurons
Specialized neurons, located in the visual cortex, that respond to the strength, angles, shapes, edges, and movements of a visual stimulus
Fovea
The central point of the retina
Gestalt
A meaningfully organized whole
Hue
The shade of a colour