Grammar

Accommodation- reflex action of the eye, in response to focusing on a near object, then looking at distant object (and vice versa), comprising coordinated changes in vergence, lens shape and pupil size

Acuity- refers to the clarity of vision. Visual Acuity is dependent on optical and neural factors, i.e., the sharpness of the retinal focus within the eye, the health and functioning of the retina, and the sensitivity of the interpretative faculty of the brain.(example: 20/20 vision)

Nearsightedness- common vision condition in which you can see objects near to you clearly, but objects farther away are blurry

Farsightedness- A vision condition in which nearby objects are blurry.

Feature detectors- individual neurons – or groups of neurons – in the brain which code for perceptually significant stimuli.

Parallel Processing- the ability of the brain to simultaneously process incoming stimuli of differing quality. This becomes most important in vision, as the brain divides what it sees into four components: color, motion, shape, and depth. These are individually analyzed and then compared to stored memories, which helps the brain identify what you are viewing. The brain then combines all of these into the field of view that you see and comprehend.

Young Hemoltz Theory- the manner in which the photoreceptor cells in the eyes of humans and other primates work to enable color vision.

Opponent Process Theory- Opponent-process theory suggests that color perception is controlled by the activity of three opponent systems. In the theory, he postulated about three independent receptor types which all have opposing pairs: white and black, blue and yellow, and red and green. ( noted that there are color combinations that we never see, such as reddish-green or yellowish-blue. )

Color constancy- example of subjective constancy and a feature of the human color perception system which ensures that the perceived color of objects remains relatively constant...