AP Psych - Vision

Question 1

Cornea

Answer 1

transparent, curved layer in the front of the eye that bends incoming light rays

Question 2

Pupil

Answer 2

small adjustable opening in the iris that is smaller in bright light and larger darkness

Question 2

Iris

Answer 2

colored muscle surrounding the pupil that regulates the size of the pupil opening

Question 3

Lens

Answer 3

structure behind the pupil that changes shape, becoming more spherical or flatter to focus incoming rays into an image on the light-sensitive retina

Question 4

Accommodation

Answer 4

process of changing the curvature of the lens to focus light rays on the retina

Question 5

Retina

Answer 5

light-sensitive surface in the back of the eye containing rods and cones that transduce light energy. Has layers of bipolar and ganglion cells that transmit visual info to the brain

Question 6

Fovea

Answer 6

small area of the retina in the most direct line of sight where cones are most concentrated for highest visual acuity in bright light

Question 7

Photoreceptors

Answer 7

modified neurons that convert light energy to electrochemical neural impulses (includes rods and cones)

Question 8

Rods

Answer 8

detect black, white, gray, and movement. necessary for peripheral and dim-light vision. throughout retina but not fovea

Question 9

Cones

Answer 9

detect color and fine detail in bright-light. mostly in fovea, none in periphery

Question 10

Bipolar Cells

Answer 10

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

Question 11

Ganglion Cells

Answer 11

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

Question 12

Blind Spot

Answer 12

region of the retina where the optic nerve leaves the eye so there are no receptor cells

Question 13

Optic Nerve

Answer 13

nerve formed by ganglion cell axons; carries the neural impulses from the eye to the thalamus

Question 14

Acuity

Answer 14

ability to detect fine details; sharpness of vision