1. Fundamentals

Question 1

Define binocular vision

Answer 1

Simultaneous perception of 2 images, one from each eye

Question 2

Define binocular single vision

Answer 2

Simultaneous use of the two eyes to give a single mental impression

Question 3

Why is lateral placement of eyes beneficial? Who is it essential for?

Answer 3

increases visual field.
This is important for hunted herbivore animals e.g. rabbit

Question 4

Why is front facing placement of eyes beneficial? Who is it essential for?

Answer 4

Allows stereopsis that improves distance judgements.
This is important for carnivorous hunters so they can accurately locate prey.

Question 5

What’s so important about having 2 eyes.

Answer 5

1. Back up eye. (incase of injury to one)
2. Larger field of view
3. Binocular summation
4. stereopsis: depth perception

Question 6

Why is stereopsis important?

Answer 6

1. Figure ground segregation (The brain’s ability to distinguish objects from their background.)
2. Avoiding collisions with looming objects
3. Effectively navigating our environment
4. Eye hand coordination

Question 7

What is simultaneous perception?

Answer 7

Ability to see two images

Question 8

What are the 2 types of fusion?

Answer 8

Sensory fusion and motor fusion

Question 9

What is sensory fusion?

Answer 9

Ability to percieve the two images as one image

Question 10

What is motor fusion?

Answer 10

The ability to maintain a single fused image using vergence movements.

Question 11

What are the 2 reference frames? Explain them

Answer 11

1. Oculocentric- Postion of objects signalled relative to fovea
2. Egocentric - Position of object signalled relative to a single reference point within our head.