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Ocular Trauma.ppt - Ocular Trauma Dr. Jaime A. Balaguer,...

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Ocular TraumaDr. Jaime A. Balaguer, Jr.
Eye AnatomyEye LidsConjunctivaCorneaAnterior ChamberIrisScleraLensRetinaOptic NerveExtraocular Muscles
Eye LidsProtects the eye (physical injury and dryness)Thinnest skin on the human body (0.5 mm thick)Three kinds of oil glands can be found on theinner layer of the eye lidLargest being the Meibomian Glands (about 20 oneach lid) on the lid border right behind theeyelashesPuncta (drainage ducts for the tears) are found onthe border close to the nose
ConjunctivaTransparent mucous membrane covering the outersurface of the eyeball (except the cornea) and theinner surface of the eyelidPalpebral vs. BulbarTissue closest to the cornea (limbal area) is theonly place where lymphatic tissue can be found inthe eye
CorneaTransparent front part of the eyeProvides most of the eye’s optical power (usually40-46 Diopters)Composed of Five LayersIt is continuous with the scleraComposed of dense regular connective tissue,which is the reason it is clear and not opaqueAvascularStroma forms bulk (90%) of the overall thickness
Anterior ChamberFluid-filled space between the Iris and theinnermost corneal surface (endothelium)Filled with Aqueous humourInternal Drainage system of the eye is found in the“corner” formed between the iris and the corneaLiquid produced by the Ciliary Body
IrisResponsible for the size of the pupil byconstricting or relaxingGives eye color depending on melaninBlue eyes have little or no melanin on the anteriorborder
ScleraComposed of dense irregular connective tissueServes as protection for internal components ofthe eye“White part of eye”Extraocular Muscles attach to the outside of sclera
LensLocated behind the IrisAvascularOnly part of the eye that continues to grow untildeath100% epithelial tissueProvides 15-20 Diopters of refractive power to theeyeAttached to Ciliary muscle by Lens ZonulesCiliary muscle controls the shape of the lensallowing for accomodation
RetinaComposed of ten layersContains photoreceptors (Rods and Cones)Central area called Macula (only area that Conesare found)Macula responsible for color and Day visionRest of retina (Rods) responsible for Night vision

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Term
Fall
Professor
Staff
Tags
Eye Shield, Anterior Chamber

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