Anatomy, Ophthalmologic Examination Junyi Chen Ophthalmology depart. of eye ENT Hospital cheney@fudan.edu.cn
Anatomy, Ophthalmologic Examination Junyi Chen Ophthalmology Depart. of Eye & ENT Hospital chenjy@fudan.edu.cn
Anatomy The orbit The eyeball The ocular Adnexa sclera retina fovea /〓 cornea rmal Duct
Anatomy • The Orbit • The Eyeball • The Ocular Adnexa
The orbit frontal bone sphenoid bone zygomatic(malar) bone Maxilla Orbital plate of frontal bone Supraorbital notch Superior orbital fissure s Lesser wing of sphenoid palatine bone ethmoid bone Ethmoid bone ·| arima| bone Orbital surface Lacrimal groove fenor orbital fissure Lacrimal bone Infraorbital groove Orbital surface of maxilla Infraorbital foramen
The Orbit • frontal bone • sphenoid bone • zygomatic (malar) bone • Maxilla • palatine bone • ethmoid bone • lacrimal bone
Apex of the orbit The entry portal for all nerves and vessels to the eye and the site of origin of all extraocular muscles except the inferior oblique Supenor orbital or opthalmic vein
Apex of the orbit • The entry portal for all nerves and vessels to the eye and the site of origin of all extraocular muscles except the inferior oblique
Blood Supply Supenor sag tal sinus fenor sagittal snus S Frontal ve Supenor ooh Occipital diploid vein Anguar vein Interior ophth posterior auncular v Occipital vean Pterygoid plexus Antenor facial vein Exomal jugular voin Postenor taal voin Internal jugular ve
Blood Supply • Arterial supply of the orbit and its structures derives from the ophthalmic artery • The first major branch of the intracranial portion of the internal carotid artery • Venous drainage is through the cavernous sinus and the pterygoid plexus
The Walls of eyeball Outer laver Cornea sclera retina Sclera Interlayer lens optic ris the ciliary body cornea nerve aqueous the choroid vitreous- nner layer Retina
The Walls of Eyeball • Outer layer – Cornea – Sclera • Interlayer – Iris – the ciliary body – the choroid • Inner layer – Retina
The cornea The cornea is a transparent tissue From anterior to posterior it has five distinct Pavement ayers. 一m yers thic the epithelium Bowmans layer Bowman' s layer the stroma Descemet's membrane Stroma the endothelium Descemet's membrane Endothelin
The Cornea • The cornea is a transparent tissue • From anterior to posterior, it has five distinct layers: – the epithelium – Bowman’s layer – the stroma – Descemet’s membrane – the endothelium
The cornea Sources of nutrition for the cornea are the vessels of the limbus the aqueous, and the tears The transparency of the cornea is due to its uniform structure avascularity and deturgescence( dehydration) Cornea Bowmans Membrane Stroma Descemet,'s Membrane b Endothelia
The Cornea • Sources of nutrition for the cornea are the vessels of the limbus, the aqueous, and the tears • The transparency of the cornea is due to its uniform structure, avascularity, and deturgescence (dehydration)
The sclera Fibrous outer protective coating of the eye Dense and white and continuous with the cornea anteriorly and the dural sheath of the optic nerve posteriorly Across the posterior scleral foramen are bands of collagen and elastic tissue, forming the lamina cribrosa cornea
The Sclera • Fibrous outer protective coating of the eye • Dense and white and continuous with the cornea anteriorly and the dural sheath of the optic nerve posteriorly • Across the posterior scleral foramen are bands of collagen and elastic tissue, forming the lamina cribrosa
Lamina Cribrosa cIRCLE SCLERA D G Sep +GLC
Lamina Cribrosa