Lecture 1 Timeline Flashcards
adult size of globe
3 years old
adult size of the orbit
16 years old
lacrimal glands become fully functional
6 weeks old
tears become present while crying
1-3 months
pigmentation of iris occurs
6-10 months old
pupillary reflex
30-35 weeks of gestation
embryonic period
first 8 weeks of pregnancy
fetal period
remaining 30 weeks of pregnancy (after the embryonic period)
neonatal period
first 4 weeks after birth
infancy
first year of life
childhood
2 years of age to puberty
adolescence
11-19 years old
elderly
above 60 years old
end of embryonic development
day 56 of pregnancy
1st trimester of pregnancy
13 weeks
most visible developmental advances in pregnancy
3-8th week of pregnancy
first evidence of eye development
optic grooves (sulci) form at 22 days
all layers of the adult retina are seen
4.5 months (midgestation)
first evidence of the macula during gestation
11-12 weeks
3.7 million ganglion cells (peak)
16th week of pregnancy
rapid loss of ganglion cells
16th week until 20th week of pregnancy
1.1 million ganglion cells (slow loss)
30th week of pregnancy
cells divide and migrate to the LGN
9.5 weeks of pregnancy
cells in the LGN take adult form
25th week of pregnancy
cell birth in newborn visual cortex
6th week to 5th month of pregnancy
fibers of the optic tract enter the LGN
7-8 weeks of pregnancy
peak number of synapses in the visual cortex
8 months post-birth
most critical period for cortical development
~7 years old
axons of the first born retinal ganglion cells reach the LGN and the superior colliculus
40-45% of pre-eye opening period
axons from LGN reach cortical subplate
50-60% of pre-eye opening period
