Chapter 3 Vocab

Question 1

The transparent tissue at the front of each eye that plays an important role in focusing the incoming light

Answer 1

Cornea

Question 2

The transparent tissue located near the front of each eye that (together with the cornea) plays an important role in focusing incoming light. Muscles control the degree of curvature of the lens, allowing the eye to form a sharp image on the retina

Answer 2

Lens

Question 3

The light-sensitive tissue that lines the back of the eyeball

Answer 3

Retina

Question 4

Cells on the retina that are sensitive to light and that respond (i.e., send a signal to adjacent cells) when they are stimulated by light

Answer 4

Photoreceptors

Question 5

Photoreceptors that are sensitive to very low light levels but that are unable to discriminate hues and that have relatively poor acuity. Often contrasted with cones

Answer 5

Rods

Question 6

Photoreceptors that are able to discriminate hues and that have high acuity. Cones are concentrated in the retina’s fovea and become less frequent in the visual periphery. Often contrasted with rods

Answer 6

Cones

Question 7

The ability to see fine detail

Answer 7

Acuity

Question 8

The center of the retina and the region on the eye in which acuity is best; when a person looks at an object, they are lining up that object with the fovea

Answer 8

Fovea

Question 9

A type of neuron in the eye. They receive their input from the photoreceptors and transmit their output to the retinal ganglion cells

Answer 9

Bipolar Cells