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Snelleneyechartfarvision2020

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Snellen Eye Chart: Far vision – 20/20Top # indicates distance from chartBottom # indicates distance normal eye could read lineNear  VisionTest people >40 and/or difficulty readingPocket screener – held 14 inchesCan use magazine or newspaperVisual Fields – Confrontation TestGross measurement of peripheral vision
Eye AssessmentObjective DataExtraocular Muscle FunctionCorneal Light Reflex – Hirschberg TestAssess parallel alignment of eyesShine light and note symmetrical reflection on corneaCover TestDetects deviated alignmentNote covered and uncovered eyeNormal response – steady fixed gaze
Eye AssessmentObjective DataExtraocular Muscle FunctionDiagnostic Positions TestFollow movement through six cardinal positionsNormal response – parallel tracking of object with eyesFailure – indicates weakness of EOM or dysfunction of CNNote Nystagmus: fine, oscillating movementNote lid lag: white rim of sclera noted btwn lid and iris on downward eye movement
Eye AssessmentObjective DataExternal Ocular Structures – InspectGeneral: facial expressionEyebrows: presence, scaling, lesionsEyelids and Lashes: upper lids overlap superior part of iris, touch lower lid when closed. Lashes curve outwardPtosis: drooping of upper lidEctropion: lower lid turns outEntropion: lower lid turns in
Eye AssessmentObjective DataExternal Eye StructuresEyeballs: note alignment, sunken protrusion appearanceConjunctiva and Sclera: clear, pink over lower lids, white over scleraLacrimal Apparatus:Lacrimal gland: Note outer part of upper lidLacrimal sac: (puncta) note tearing
Eye AssessmentObjective DataAnterior Eyeball Structures – InspectCornea and LensAssess smoothness and clarityShine light from side across corneaIris: flat, round, even colorationPupils: round, regular, equal in sizeAnisocoria: pupils with different sizesRed Flag : unequal pupils – consider CNS injury
Eye Assessment

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Term
Fall
Professor
Meneghini
Tags
Nursing, Arcus senilis, External Eye Structures, Eye Assessment

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