Eye Quiz

Question 1

pulses of ______ energy strike our eye

Answer 1

electromagnetic

Question 2

wavelengths determine…

Answer 2

hue, intensity, and amplitude.

Question 3

Hue

Answer 3

The color we experience, this is determined by the distance from the peak of one wave to the next.

Question 4

Intensity

Answer 4

• the brightness of the color we see

- the amount of energy in a wave determined by its amplitude (height)

Question 5

Phase 1: Gathering light

Answer 5

take in electromagnetic waves

Question 6

Phase 2: Getting light in the eye

Answer 6

light enters through the cornea, which protects the eye and bends lights to provide focus.

Question 7

Phase 3: Transduction

Answer 7

• rods and cones

- Ganglion axons form a nerve network called the Optic Nerve which crosses at the Optic Chiasm to send info to thalamus.

Question 8

Rods and cones

Answer 8

are the eyes receptor cells activating bipolar and ganglion cells.

Question 9

Cones: Fovea

Answer 9

• the retinas area of central focus
• in charge of fine detail and color vision
• low sensitivity in dim light.

Question 10

Rods: Peripharal Retina

Answer 10

• detect black , white, and gray

- high sensitivity in dim light

Question 11

Acuity

Answer 11

The sharpness of vision

-can be affected by small distortions in the eye’s shape.

Question 12

Accomodation

Answer 12

the process by which the eyes lens changes shape to help focus near or far objects on the retina.

Question 13

blind spot

Answer 13

point at which the optic nerve leaves the eye, creating a “BLIND SPOT” because there are no receptor cells.

Question 14

Phase four: in the brain

Answer 14

-goes to visual cortex in occipital lobe of the cerebral cortex.

Question 15

Phase 4 (p2) Feature Detectors

Answer 15

nerve cells responding to features of a specific stimulus.

Question 16

Visual info processing in the brain: Parallel Processing

Answer 16

• seeing several aspects at once

- people who have suffered brain damage may lose the ability to process all aspects.

Question 17

Trichromatic Theory

Answer 17

• Young and Helmnotz
• 3 different retinal color receptors
• three types of cones: red, blue, green
• these cones can make millions of combinations of colors
• DOES NOT EXPLAIN COLOR BLINDNESS WELL

Question 18

Opponent-Process Theory

Answer 18

• The sensory receptors come in pairs
• red/green, yellow/blue, black/white
• If one color is stimulated, the other is not.

Question 19

Phase 2 Part 2

Answer 19

• Light passes through the pupil, the small adjustable opening
• Pupil size is regulated by the iris, the colored muscle around the pupil, determining how much light is entering the eye
• behind the pupil is the lens that focuses incoming rays into a image
• These images are focused on the retina, the eyeballs light sensitive inner surface.

Question 20

How do we see?

Answer 20

we see upside down, but the brain processes it right side up.

Question 21

Normally the cornea and lens focus the image if any object on the _____

Answer 21

retina