anatomy of cornea copy

ANATOMY OF CORNEASudarsan

HUMAN EYE

INTRODUCTION•TRANSPARENT•AVASCULAR•WATCH GLASS LIKE STRUCTURE•FORMS ANTERIOR 1/6 TH OF OUTER FIBROUS COAT•REFRACTIVE POWER

+43 TO +44 dioptres

EmbryologySURFACE

ECTODERMMESENCHYME

EMBRYOLOGY.. CORNEAL EPITHELIUM- SURFACE

ECTODERM OTHER LAYERS- FIBROUS LAYER OF

MESENCHYME LYING ANTERIOR TO THE OPTIC DISC

DIMENSIONS

HISTOLOGY

HISTOLOGY.. EPITHELIUM BOWMAN’S MEMBRANE SUBSTANTIA PROPRIA DUA’S LAYER DESCEMET’S MEMBRANE ENDOTHELIUM CORNEAL ABRATION CORNEAL SCARRING

BLOOD SUPPLY AVASCULAR NOURISHMENT: TEARS AQUEOUS

HUMOUR LIMBAL

CAPILLARIES OXYGEN GRADIENT: FROM TEARS TO

AQUEOUS METABOLISM: AEROBIC : MAJOR ANAEROBIC :

MINOR

NERVE SUPPLY

NERVE SUPPLY..

LYMPHATICS IT’S DEVOID OF LYMPHATICS

TRANSPERANCY OF CORNEA DEHYDRATED STATE ABSENCE OF BLOOD VESSELS AND PIGMENTS

UNIFORM REFRACTIVE INDEX UNIFORM SPACING OF COLLAGEN FIBRES

FUNCTIONS ALLOWING TRANSMISSION OF LIGHT FOCUS THE LIGHT MAINTAINS STRUCTURAL INTEGRITY

OF GLOBE PROTECTION AGAINST INFECTION,

UV, NOXIOUS AGENT

CORNEAL OEDEMA MEGALOCORNEA (>13mm) MICROCORNEA (<9mm) CORNEAL ULCER ARCUS SENILIS - DEGENERATIVE KAYSER FLEISCHER RING

APPLIED…

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THANK U

SPECIAL THANKS TO: N.SUDARSAN