perception 2 vision

Question 1

what is the eye

Answer 1

organ used to detect light
- light is bouncing around and enters the eyeball through pupil

Question 2

cornea

Answer 2

• first thinng light comes across
  transparent film in front of eyeball
  keeps dust from entering
  keeps goo inside eyeball from coming out

Question 3

pupil

Answer 3

• hole in the front of the eye that allows light to come through
• can become wider to allow more light in (dark environment) or narrower to allow less light in (bright environment)
• does this through iris

Question 4

iris

Answer 4

• coloured part of the eye
• collection of small muscles that can expand and contract the pupil

Question 5

lens

Answer 5

• once light gets through the pupil
• blob of transparent material that can either stretch or be more thick and round to focus light onto retina

Question 6

ciliary muscles

Answer 6

• lens is attached by the ligaments to the ciliary muscles
• can contract which stretches the lens out long and thin or relax leading the lens to return to thicker blob shape
• focuses light into retina of the eye

Question 7

main part of eyeball

Answer 7

• transparent goo made up of water, proteins, etc
• gives eyeball its frigidity
• allows light to pass through to get to retina

Question 8

retina

Answer 8

• where all the light detecting cells are
• also has neurons and nerve cells that process and transmit information to the brain

Question 9

fovea

Answer 9

• where light from whatever you’re looking directly at falls
• contains primary cones

Question 10

optic nerve

Answer 10

• where all the neurons that carry information from the light detecting cells in the retina to the brain
• bunch up and leave eyeball to the brain

Question 11

visual pathways

Answer 11

• info from the right side of space is processed in the left hemisphere and vice versa
• made possible by optic chiasm
• AP travel along optic nerve out of the eyeball and onward to the brain to be processed
• goes to the Lateral Geniculate Nucleus (LGN)
  (part of thalamus that deals with visual information) (small amt of processing occurs)
• goes to primary visual cortex
  1. more visual processing takes place

Question 12

lateralisation of processing

Answer 12

• some tasks are preferentially performed in the left or right hemisphere of the brain
• facial processing is preferentially in the right hemisphere of the brain