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