Lecture 1 Timeline

Question 1

adult size of globe

Answer 1

3 years old

Question 2

adult size of the orbit

Answer 2

16 years old

Question 3

lacrimal glands become fully functional

Answer 3

6 weeks old

Question 4

tears become present while crying

Answer 4

1-3 months

Question 5

pigmentation of iris occurs

Answer 5

6-10 months old

Question 6

pupillary reflex

Answer 6

30-35 weeks of gestation

Question 7

embryonic period

Answer 7

first 8 weeks of pregnancy

Question 8

fetal period

Answer 8

remaining 30 weeks of pregnancy (after the embryonic period)

Question 9

neonatal period

Answer 9

first 4 weeks after birth

Question 10

infancy

Answer 10

first year of life

Question 11

childhood

Answer 11

2 years of age to puberty

Question 12

adolescence

Answer 12

11-19 years old

Question 13

elderly

Answer 13

above 60 years old

Question 14

end of embryonic development

Answer 14

day 56 of pregnancy

Question 15

1st trimester of pregnancy

Answer 15

13 weeks

Question 16

most visible developmental advances in pregnancy

Answer 16

3-8th week of pregnancy

Question 17

first evidence of eye development

Answer 17

optic grooves (sulci) form at 22 days

Question 18

all layers of the adult retina are seen

Answer 18

4.5 months (midgestation)

Question 19

first evidence of the macula during gestation

Answer 19

11-12 weeks

Question 20

3.7 million ganglion cells (peak)

Answer 20

16th week of pregnancy

Question 21

rapid loss of ganglion cells

Answer 21

16th week until 20th week of pregnancy

Question 22

1.1 million ganglion cells (slow loss)

Answer 22

30th week of pregnancy

Question 23

cells divide and migrate to the LGN

Answer 23

9.5 weeks of pregnancy

Question 24

cells in the LGN take adult form

Answer 24

25th week of pregnancy

Question 25

cell birth in newborn visual cortex

Answer 25

6th week to 5th month of pregnancy

Question 26

fibers of the optic tract enter the LGN

Answer 26

7-8 weeks of pregnancy

Question 27

peak number of synapses in the visual cortex

Answer 27

8 months post-birth

Question 28

most critical period for cortical development

Answer 28

~7 years old

Question 29

axons of the first born retinal ganglion cells reach the LGN and the superior colliculus

Answer 29

40-45% of pre-eye opening period

Question 30

axons from LGN reach cortical subplate

Answer 30

50-60% of pre-eye opening period