Lecture 3 Timeline

Question 1

Adult contrast sensitivity is greatest to intermediate spatial frequencies

Answer 1

@4 cpd

Question 2

Adult CS peak

Answer 2

@4 cpd

Question 3

High SF cutoff

Answer 3

BVA @ 16-32 cpd

-limited by packing of photoreceptors

Question 4

Peak CS @4 cpd

Answer 4

the average receptive field size of retinal ganglion cells

Question 5

Low SF cutoff

Answer 5

lateral inhibition @ 2cpd

Question 6

Newborns cannot resolve objects above

Answer 6

2-3 cpd

Question 7

no lateral inhibition or contour enhancement

Answer 7

up to 2 months

Question 8

2 cpd high SF cutoff

Answer 8

2 months

Question 9

20 cpd high SF cutoff

Answer 9

10 months

Question 10

peak adult level CS

Answer 10

4 years old

Question 11

lowest sensitivity to low SFs

Answer 11

8-15 years old

Question 12

CS peak at all SFs

Answer 12

18 years (remain until 39 yeasr)

Question 13

loss of sensitivity to high SF

Answer 13

45-66 years

Question 14

poor stereopsis will result

Answer 14

if depressed (<2.5 cpd), CS at 35 months (due to anisometropia, refractive error, or amblyopia)

Question 15

CS reaches adult levels

Answer 15

7-9 years

Question 16

CS in normal adults

Answer 16

binocular > monocular

Question 17

CS in normal infants (3-36 months)

Answer 17

binocular is similar to monocular (except at 12 months, where monocular is much lower)

Question 18

improving contrast sensitivity can be seen

Answer 18

1-3 months