Chapter 4.2: Visual pathways - Connections between the Eye and the Brain

Question 1

Visible light

Answer 1

Portion of electromagnetic spectrum that we can see

Question 2

Visual acuity

Answer 2

Ability to see fine detail

Question 3

Three properties of light waves

Answer 3

Length - Determines hue or colour
Intensity/amplitude - Brightness of light
Purity - saturation of color

Question 4

Cornea

Answer 4

Clear, smooth outer tissue; Bends light wave to send through pupil

Question 5

Pupil

Answer 5

Hole in the colored part of the eye

Question 6

Iris

Answer 6

Colored part of the eye; muscle which controls how much light can enter eye

Question 7

Retina

Answer 7

Light-sensitive tissue lining the back of the eyeball

Question 8

Accomodation

Answer 8

Process by which the eye maintains a clear image on the retina
- Lenses flat: objects farther away
- Lenses rounded: Objects nearby

Question 9

myopia

Answer 9

Nearsightedness caused by long eyeballs resulting in images being focused in front of retina

Question 10

Hyperopia

Answer 10

Farsightedness caused by short eyeballs resulting in images being focused behind retina

Question 11

Photoreceptor cells

Answer 11

Transduce light into electrical signals

Question 12

Cones

Answer 12

Colour; operate under normal daylight conditions; focus on fine detail

Question 13

Rods

Answer 13

activate under low light conditions for night vision

Question 14

Blind spot

Answer 14

Location in the visual field that produces no sensation on the retina

Question 15

Area V1

Answer 15

Part of occipital lobe that contains the primary visual cortex

Question 16

Color-opponent system

Answer 16

Pairs of cone types work in opposition

Question 17

Visual receptive field

Answer 17

The region of the visual field to which each neuron responds