EMB 1 Development of the eye Flashcards
development of the eye
begin to develop when what appear? day?
derived from? (4)
series of inductive signals involving ______, _____, ____
optic grooves appear in?
neural folds fuse _______ are induced by ____ _____
optic vesicle?
what is it?
protrudes into what? and will contact what?
vesicle cavities are continuous with?
distal end of optic vesicle?
what thickens creating what?
placode formation is induced by?
only occur after 2 steps?
the placode will thin do what forming?
this will then fuse what? this causes what to happen?
optic vesicles invaginate to form? which is?
cup will form what? then what?
the optic cup
what forms on ventral surface? also along?
what forms in center of optic cup? (where is this)
how does optic nerve form?
myelination happens when?
what develop from the mesenchyme of retinal fissures?
(2)
these are enclosed w/in?
distal? turns into? proximal? turns into?
retina
develops from? this forms what layers?
which in outer/inner? thick/thin?
separates retinal layers? derived from? disappears when?
optic cup come from? layer are continuous with?
retina formation
which layer proliferates? forms?
which will differentiate into?
what regulates retinal ganglion cell differentiation?
what obliterates cavity of optic stalk?
optic vesicle invaginates to form optic cup —–> __________ —–> photoreceptor cells are closest to?
optic nerve
surrounded by? that evaginate with?
three sheaths? continuous with?
CSF found where?
wedge-shaped extension of the choroid?
medial surface projects toward? forming?
pigmented portion of ciliary epithelium is derived from? continuous with?
ciliary body
nonvisual retina= ?
ciliary muscle?
CT in ciliary body develops from?
develop from rime of optic cup?
grows where?
____ epithelium represents what layer optic cup?
continuous w/ epithelium of ____ ___ and?
CT derived from?
two muscles? derived from?
color of iris
what color in neonates?
pigmentation when?
what determines eye color?
blue vs brown?
iris heterochromia
lens development
develops from? (type)
what becomes lens epithelium?
posterior wall of lens vesicle do what?
2 genes for induction of lens?
3 genes for formation/differentiation of lens fibers?
rim of lens called? why?
cells here are? (shape) will then do what?
adulthood?
primary lens fibers through life?
lens is supplied by what vessel? in fetal period?
also depends on?
invested by a vascular _____ _____ called?
anterior part is the?
what degen what remains?
vitreous body
forms where?
composed of?
primary? derived from?
secondary? from?
aqueous chambers
anterior chamber
develops from?
what forms substantia propria?
after lens is established it induces what to happen?
develop into?
aqueous chambers
posterior chamber of the eye
develops from space that forms in? posterior to anterior to?
communicates with anterior via? formed when?
cornea
induced by? transforms what into?
- external corneal epithelium- derived from?
- mesenchyme- derived from?
- neural crest cells- from?
choroid and sclera
what reacts to inductive signals of what?
differentiates into what two layers?
sclera develops from?
choroid becomes modified to form? consisting of?
what is it?
can occur where?
2 types?
retinal detachment
occurs when?
may result from?
detachment is at site of? what remains?
postnatally pigment layer normally becomes fixed to?
may follow what?
fluid accumulation of optic disc?
what can cause?
what occurs? why?
congenital glaucoma
what is it?
due to?
may result from abnormal development of?
most cases in what gene?
congenital cataracts
lens is? without treatment?
causes?
lack of iris tissue or almost complete absence of iris?
congenital? due to?
arrest of development at? (when)
may be associated with?
get it how?
persistent hyaloid artery
distal usually? anterior?
if persists what might you see?
microphthalmic seems to mean small
- B
- A
- B
- A
- E
- A
- A
