Blood supply of orbit + Embryo Flashcards
بسم الله الرحمن الرحيم وبه نستعين
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Opthalmic artery origin ?
ICA emerging from roof of cavernous sinus medial to ant clenoid process
Coures and relation of Opthalmic artery :-
Entering Orbit through …….?
………..to optic nerve ? both are enclosed with ?
It pireces the ,,,,,,,, crossing above ……….. with ……. from ….to…….. running along the ….wall of orbit between two muscles mention ?
Terminated near the medial angle of eye by dividing into ? ?
Optic canal
Inferolateral - common dural sheath
dura mater - optic nerve - nasociliary nerve from lateral to medial along the medial wall
Between superior oblique and MR
Termination ? =
Dorsal nasal + supraTrochlear arteries
Coures and relation of Opthalmic artery :-
Entering Orbit through …….?
………..to optic nerve ? both are enclosed with ?
It pireces the ,,,,,,,, crossing above ……….. with ……. from ….to…….. running along the ….wall of orbit between two muscles mention ?
Terminated near the medial angle of eye by dividing into ? ?
Optic canal
Inferolateral - common dural sheath
dura mater - optic nerve - nasociliary nerve from lateral to medial along the medial wall
Between superior oblique and MR
Termination ? =
Dorsal nasal + supraTrochlear arteries
The most imp branch of opthalmic art ?
Central retinal artery
Central retinal artery
Arises from,……near……..
running below …… in …… pierces the ……..about 1/2 inch behind the eyeball to run in the substance of the nerve
Dividing into ,…..and……..branches each giving ….and….. branches ? to supply ?
Opthalmic artery near optic canal
Running below dural sheath pierceing the optic nerve
dividing into supiero and inferior branches each into temporal and nasal branches
The only artery can be seen by naked eye in fundus examination ?
Central retinal artery
Mention branches of Opthalmic artery IMP
-Central retinal artery
-Post ciliary arteries for choroid and iris
-Musclear or ant ciliary
-Lacrimal giving Lateral palpebral ! + Zygomatic + meningeal
-Medial palpebral
-Ant and post ethmoidal
-Dorsal nasal
-SupraOrbital
-SupraTrochlear
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2 ciliary 2 ethmoidal 2 supra 2 palpebral + dorsal nsal
CES PDor
كيس بذور
اي حاجة@@
Ciliary - Ethmoidal - supra - palpebral remember lacrimal + dorsalارسم الرسمة @@
Venous drainage of eye ?
Superior and inferior opthalmic veins
Vein accomaniying opthlamic artery above the optic nerve
? SOV
vEIN Passes through Superior Orbital fissure and drarins into cavernous sinus ?
Superio othalmic vein
SOV communcating anteriorly with ,,,+,,,,,,
SupraOrbital veins + Angular veins
Drainaing of Inferior Opthamic vein
1-Direct into Cavernous sinus
2-Indirect into cavenorus sinus through joining SOV
3-Indirect into Cavernous sinus through joining Pterygoid venous pleux by a smaal vein passing through Inferiro Orbital fissure
Mnetion Lymphatics of Orbit
Drains into Periauricualr LNs
Mention structre of eyelid
Skin
superficial fascia = Papbebral Orbiuclaris oculi
Palpebral fascia = Tarsus + meibomian glands
Conjunctiva
Mention blood supply of eye lids ?
Arterial =
Medial palpebral from opthalmic
Lateral palpebral from Lacrinal of opthalmic with anastomisis
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venous = opthalmic + Facial veins
Anstomisis between ICA and ECA in Eye ?
Dorsal nasal of opthalmic FROM ICA
Facial artery giving nasal branch From ECA
mENTION nereve supply of EYE LID ?
upper eyelid palpebral form lacrimal of OPTHALMIC
lower eyelid Palpebral from InfraOrbital Of Maxillary
Both Trigeminals
Lymph drainage of Eye lids?
Medial halves in Submandibular LNS
Lateral halves in Periauricular LNS
Mention sources of eye developments
=Neuroectoederm 5 CO2RI
Ciliary bodies + irsis + Optic nerve + optic vesicle + retina
=Surface ectodemrs lenc : Lens vesicel + Corneal (epithelium )
Mesoderm VASC2 :
=Viterous body+ ant chamber + Sclera + choroid + Cornea except epithelium
Optic vesciles are formed at which week ? >
Week 4 ! causing formation of lens palacode then lens pit which spearates formin lens vesicle
from ectoooderm!
How lens vesicle is formed
At 4th week Optic vesicle formed cuasing formation of lens palacode then lens pit speataed forming lens vesicle
from ectodemm!!
Optic cup is ,,,,, layered forming ?
dobule
the oute layer= pigment layer of retina
the inner layer
4/5 post = Raminaing retina
ant 1/5 = Ciliary bodies + Iris
When Pigemnt and neural layers of retina are fused ?
when Intrarteintal space disappears
how is choroid fissure formed ?
when it is closed?
By contiunation of Inavagintation of the optic cup
during the 7th week
how pupil formed?
when choroid fissure is clsoed during 7th week then the mouth of the cup becomes a round opening forming the futeure pupil
tHROUGH CHOROID FISSURE …. rEACHES anterior chamber of eye ?
Hyaloid artery
When choroid fissure closed what happens to optic stalk and its content ?
Transofrmed to optic nerve
contents :
Hyaloid artery forming central retinal artery then is is disappear
The optic nerve is surrounded by continuation of ,……+,,,,,,,,,,, known as,,,,,,,,,,+,,,,,,,, layer of the nerve
Choroid + sclera
Pia-arachnoid + Dural layers of nerve
Choriiod fissure contains ?
Hyaloid artery
Reuteinig fibers of retina to the brain
At the end of the 5th week what happens
The eye is fully surrounded by mesehnchyme differentiating into 2 layers :
1-Inner comaparabple to pia = choroid
2-oute comparable to dura = Sclera
What happens to mesenchyme of anterior chamber at ending ot week 5 ?>
Vaculization forming the ant chamber then :
1-Iridiopupillary meembrance infront of lens +iris
2-Substania propria of cornea
Conrea from outsied is formed by?
Epithlieal layer by surface ectoderm
Substania propria formed contiunation of sclera : mesoderm
Epithelial layer : linign anterior chamber
The irdiopupillary membrane disappears for ?
Allowing communication between ant and post chambers of the eye
The mesnchyme forms …
and hyaloid vessles…..
Viterous body
disappears
Cleft in lower part of iris ?
Coloboma Iridis
Faiulure of closure of choroid fissure ?
Coloboma iridis
Coloboma irids may extends to ?
Iris - Ciliary body -choroid - Retina - optic nerve
Congenital catarct is due infection of pregnant women with ,,,,,? from ,,,,, to ……..weeks
German measels
4th to 7th
CMV and toxoplamosis and urinary tract infections of prenant may cause wicch anmoaly?
Mico-OPhtlamia
Anopthelamia is accompanid with ?
Serious craniocerbreal abnoramlitirs
الحمدلله رب العالمين
