Eye Development

Question 1

Optic Nerve

Answer 1

Neuroectoderm

Diencephalon→Optic groove→Optic vesicle→Optic stalk→Optic nerve

Question 2

Retina

Answer 2

Neuroectoderm

Diencephalon→Optic groove→Optic vesicle→Optic cup→Retina

Question 3

Iris: Muscular layer

Answer 3

Neuroectoderm

Diencephalon→Optic groove→Optic vesicle→Optic cup→Dilator pupillae m and sphincter pupillae m

Question 4

Iris: CT layer

Answer 4

Mesenchyme from NC

Question 5

Eyelids

Answer 5

Mesenchyme from NC

Fused from weeks 8-27

Question 6

Sclera

Answer 6

Mesenchyme from NC

Outer fibrous layer; continuous w/ supporting tissue of cornea

Question 7

Choroid

Answer 7

Mesenchyme from NC

Deeper vascular layer; continuous w/ ciliary body

Question 8

Ciliary body

Answer 8

Mesenchyme from NC

Extension of choroid; contains smooth m; ciliary processes produce aqueous humor

Question 9

Cornea: Middle and inner layer

Answer 9

Mesenchyme from NC

Continuous w/ sclera; lens vesicle causes formation

Question 10

Cornea: Outer layer

Answer 10

Surface ectoderm

Lens vesicle causes formation

Question 11

Lens

Answer 11

Surface ectoderm

Optic vesicle causes thickening of surface ectoderm→lens placode→lens pit in lens placode→pinches off→lens vesicle→lens