Eye Embryology - Acht Flashcards
The optic cups go on to form what structures?
retina, optic nerve, ciliary body, iris
What induces development of the eye?
Neuroectoderm
The optic vesicles or evaginations will induce the development of what? (from surface ectoderm)
lens placode
What happens to the hyaloid artery during development?
Abnormailites associated?
IT will completely disappear!
IF it does not disappear you get blurry vision
What causes a congentital coloboma?
Defective closure of the choroid or optic fissure at anterior border
If it doesn’t close posteriorly then you get a missing part of the retina (Retinal coloboma)
What eye structures does the neuroectoderm develop into?
Retina, iris, ciliary bodies
The developmental intraretinal space is reformed when what eye pathology occurs?
retinal detachment
Where does the lens get its fluid after the hyaloid arteries disappear?
ITs avascular and gets nutrients from the fluid in the eye chambers
What acts on the mesoderm to create the anterior chamber of the eye?
The lens does!
What does the lens placode develop into?
Lens pit, lens vesicle (as it invaginates into the surface ectoderm)
Then it will become the lens
What does the outer layer of the optic cup become?
The RPE - Retinal Pigmented Epithelium
What does the inner layer of the optic cup become?
The neural layer of the retina
AKA - rods, cones, ganglion cells. etc
What muscles in the eye are an exception to the rule that muscles develop from mesoderm?
The Sphincter pupillae & dilator pupillae muscles are formed from the neuroectoderm of the optic cup.
Say what????? Ya.
What induces the formation of the sclera and choroid?
The RPE
Anopthalmia/Micropthalmia
What is it???????
Rare disorder with one or two eyes absent or too small
