Anatomy- of-EYE-.ppt

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1. ANATOMY OF
EYE
By :
Dr. Manjula Vastrad
Asst Prof
Dept of Shareera Rachana
SMVVS RKM AMC
VIJAYAPURA

2. Introduction
Theeyeisaspecializedsenseorganthathelps
ustounderstandourenvironment.Itisa
sensoryunitcomposedofthreeparts:receptor,
sensorypathway,andabraincenter.Itis
sphericalinshaped.Itisabout2.5cmin
diameter&situatedintheorbitalcavity

4. Theeyeismadeupof
threecoats,orlayers,
enclosing various
anatomicalstructures.
Theoutermostlayer,
knownasthefibrous
tunic,iscomposedof
thecorneaandsclera,
whichprovideshapeto
theeyeandsupportthe
deeperstructures.

5. Themiddlelayer,
known as
thevasculartunic
oruvea,consists
of
thechoroid,cilia
ry body
pigmented
epithelium
andiris.

6. Theinnermost
istheretina,
whichgetsits
oxygenation
fromtheblood
vesselsofthe
choroid(posteri
orly)aswellas
the retinal
vessels
(anteriorly).

7. Layers:-
1.Sclera–white,outerlayeroftheeyeball;
tough,fibrousmembranethathelpsto
maintainthesphericalshapeoftheeyeball
2.Cornea–partofscleroticcoat;
transparent,frontpartofeyeballthrough
whichlightwavespass,nobloodvesselsbut
lotsofnerveendings

8. 3.Choroidlayer–middlelayeroftheeye;supplies
bloodvesselstotheeyeandcontainsdarkpigment
granulesthatpreventthereflectionoflightinthe
eye.
4.Ciliarybody–intrinsicmuscle;smoothmuscle
fiberssupport&modifylensshape
5.Iris–coloredportionofeyeformedbycircularly
andradiallyarrangedsmoothmusclefibers;
regulatesamountoflightenteringtheeyeby
constrictingordilatingthepupil

9. 6.Pupil–roundedopeningoftheiristhrough
whichlightpasses
7.Retina–innermostlayeroftheeye;linesits
surfaceandcontainsphotoreceptors(cells
responsibleforconvertinglightintonerve
impulses–rods&cones)
8.Lens–flexible,biconvex,crystal-likestructure
thatbringsraysoflightintofocusandproduces
animageontheretina

10. Suspensory
ligament –
holds the lens
in place;
attached to the
ciliary body,
which controls
the amount of
tension
exerted on the
lens

11. Aqueoushumor–
wateryfluidthat
providesnutrition
and helps
maintain the
shape ofthe
cornea;foundin
the smaller,
anteriorchamber
oftheeye

12. Vitreoushumor–
thick, gel-like
substance that
fillsthelargest
chamberofthe
eyeandhelpsto
holditsspherical
shape

13. opticdiscoroptic
nerveheadisthe
pointofexit
for ganglion
cellaxonsleaving
theeye.Because
therearenorodsor
conesoverlyingthe
opticdisc,it
correspondstoa
smallblindspotin
eacheye.

14. •Blood supply:-
Carotidartery
Ophthalmic
arteryCilliary
artery&Central
retinalartery
Eye

15. VENOUS DRIANAGE :
OPTHALMIC VEINS,
ORBITAL VEINS,
VORTEX VIENS,
RETINAL VEIN,
ANGULAR VEIN.

16. INNERVATION :
Opthalmic Nerve,
Oculomotor Nerve,
Maxillary Nerve,
Frontal Nerve,