Development of the Eye

Question 1

Eye development is concurrent with which other type of development in the 3rd week

Answer 1

neural tube

Question 2

What do the optic grooves become?

Answer 2

optic vesicles

Question 3

What forms when the optic vesicles invaginate?

Answer 3

optic cup

Question 4

What separates the inner and outer layers of optic cup?

Answer 4

intraretinal space

Question 5

What is the primordial blood supply? What allows it to reach the inner chamber?

Answer 5

hyaloid a.

- retinal fissure

Question 6

What do the posterior 4/5 of cells from pars optic retinae become?

Answer 6

1) rods and cones (photoreceptive layer)
2) mantle layer with neurons of inner and outer nuclear layer and ganglion layer
3) fibrous layer with axons

Question 7

When the nerve fibers of the pars optic retinae converge what is formed?

Answer 7

optic stalk and eventually the optic n

Question 8

How many cell layers thick is the pars ceca retinae?

Answer 8

1 layer

Question 9

What does the ant 1/5 of inner layer pars ceca retinae form?

Answer 9

inner layer of iris and part of the ciliary body

Question 10

What does the loose mesenchyme overlying optic cup and surface epithelium form?

Answer 10

sphincter papillae and dilator pupillae

Question 11

What does the mesenchyme covering the pars ciliaris retinae form?

Answer 11

ciliary m

Question 12

What connects the pars ciliaris retinae to the lens?

Answer 12

suspensory ligament (zonula) - controls curvature of lens

Question 13

T/F lens fibers are continuously added to core lens vesicle

Answer 13

T

Question 14

Mesenchyme tissue surrounding primordial eye differentiates into..

Answer 14

inner layer (similar to Pia) -> vascularized choroid
outer layer (similar to dura) -> sclera, cont w/ dura surrounding optic n

Question 15

What does cornea form from?

Answer 15

epithelial layer of ectoderm, substantial propria, epithelial layer approximating ant chamber and iridiopupillar membrane disappears

Question 16

What is the mesenchmy elf ant chamber split into?

Answer 16

inner layer in front of lens and iris, iridopupillary men, substrata propria of cornea

Question 17

What does post chamber lie between?

Answer 17

iris and lens/ciliary body

Question 18

How do ant/post chambers communicate?

Answer 18

through pupil

Question 19

What produces aqueous humor?

Answer 19

ciliary process of ciliary body

Question 20

What does mesenchyme invading the choroid fissure form?

Answer 20

hyaloid vessels -> supply lens from vascular layer of retina

Question 21

What is left when the hyaloid vessels resorb?

Answer 21

hyaloid canal -> central a. of retina

Question 22

Where do n fibers of the retina lie along the optic stalk?

Answer 22

inner stalk