The Eye Michael Hall PhD University of California Los Angeles University of California Los Angeles.

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Presentation transcript:

The Eye Michael Hall PhD University of California Los Angeles University of California Los Angeles

Lens Cornea Pupil Iris Retina Sclera Eyelid

Meibomian glands Meibomian glands Levator muscle Levator muscle Orbicularis muscle Orbicularis muscle Conjunctiva Lacrimal gland Eyelids

Ducts TearsTears

CorneaCorneaIrisIris LensLens FoveaFovea ChoroidChoroid ScleraSclera RetinaRetina Optic nerve Anterior chamber Vitreous gel LimbusLimbus Central retinal Artery and vein Central retinal Artery and vein ScleraSclera Posterior chamber Ciliary body

Cornea Sclera (Covered by conjunctiva)

Limbus Sclera (Covered by conjunctiva)

LimbusLimbusSclera(Opaque)Sclera(Opaque) Cornea(transparent)Cornea(transparent) Blood vessels Anterior chamber

EpitheliumEpitheliumEndotheliumEndothelium Bowmans membran e Bowmans Descemets Descemets

Opaque cornea

Transplanted cornea

LasikLasik Near sighted- Cornea is too curved --so it is made flatter Far sighted- Cornea is too flat --so it is made steeper Near sighted- Cornea is too curved --so it is made flatter Far sighted- Cornea is too flat --so it is made steeper

Iris Pupil

Iris

Sphincter muscle Dilator muscle Iris Parasympathetic) (Parasympathetic) (Sympathetic)(Sympathetic)

Iris Sphincter muscle Pupil Lens

Epithelium

Lens Aqueous humor Lens is avascular --nutrition is from aqueous humor Lens is avascular --nutrition is from aqueous humor

Lens SuspensoryligamentsSuspensoryligaments

Suspensory ligaments A B

Ciliary processes ligaments Ciliary muscle (parasympathetic)

Posterior chamber Anterior chamber Schlemm’s canal Aqueous humor Production of Aqueous Humor Ciliary processes Aqueous humor nourishes the avascular lens and cornea and maintains pressure in the anterior chamber Cornea

Posterior chamber Anterior chamber Schlemm’s canal blocked blocked Aqueous humor GlaucomaGlaucoma Causes in IOP& death of ganglion cells Causes in IOP& death of ganglion cells Ciliary processes

Retina Vitreous humor

Retina Light

Rods & Cones Bipolar cells Ganglion cells Nerve fibers (axons) Nerve fibers (axons) Pigment Epithelium Muller cells

Outer segment Inner segment Nucleus Synaptic terminal Connecting cilium Rod Cone

Cones (6 x 10 6 ) Rods (120 x 10 6)

R G B Wavelength (nm)

Cones ConesCones ConesCones Rods & Fovea of retina

Macular Degeneration

Retina Choroid Sclera (blood vessels and capillaries) (blood vessels and capillaries) Pigment epithelium Pigment epithelium

Optic nerve

Nerve fiber layer Ganglion cells

Arachnoid with subarachnoid space Arachnoid with subarachnoid space Pia Optic nerve Dura Central artery Central vein Septae Nerve fascicles Nerve fascicles

R G B Wavelength (nm)

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