Chapter 4 psychology terms and questions Vision and the Human Eye

Rays of light from an object pass from the object through your cornea, aqueous humor, pupil, lens and vitreous humor before forming an jmahe on your ____.

Retina

Translarent curved layer in the front of the eye that bends incoming light rays. What does this?

Cornea

Small adjustable opening in the iris that is smaller in bright light and larger in darkness. What is this?

Pupil

What is the definition of lens?

Structure behind the pupil that changes shape

Retina

Light-sensitive surface in the back of the eye containing rods and cones that transducer light energy

What has layers of bipolar cells and ganglion cells that transmit visual information to the brain?

Retina

Fovea

Small area of the retina in the most direct line of sight where fines are most concentrated

What are photoreceptors?

Modified neurons that convert light energy to electrochemical neural impulses

Rods are photoreceptors that detect what colors?

Black, white, and gray

Cones are photoreceptors that detect what?

Color and fine detail in daylight or bright-light condition

Where are cones most concentrated?

At the fovea of the retina

Cells-second layer of neurons in the retina that transmit impulses from rods and cones to ganglion cells

Bipolar

Cells-third layer of neurons in the retina, whose axons converge to form the optic nerve

Ganglion

What is the optic nerve?

Nerve that carries neural impulses from the eye to the thalamus of the brain

Dark adaptations

Increased visual sensitivity that gradually develops when it gets dark

What does the trichromatic theory propose?

It proposes mechanism for color vision with cones that are differentially sensitive to different wavelengths of light.

This theory proposes the mechanism for color vision with opposing retinal processes for red-green, yellow-blue, and white-black

Opponent-process theory