Histology of the Eye: Chambers & Refractile Media

7/24/2019 Histology of the Eye: Chambers & Refractile Media

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Chambers of the Eye


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Chambers of the Eye

Boundaries are the layers of the eyeand the lens

1. Anterior chamber

2. Posterior chamber

3. Vitreous chamber


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Chambers of the Eye

Anterior chamber Space between

the cornea and

the iris Posterior

chamber Space between

the posteriorsurface of the irisand the anteriorsurface of thelens


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Chambers of the Eye

Vitreouschamber Space between

the posteriorsurface of thelens and theneural retina

Contains "itreousbody# a lar$e$elatinous massof transparentconnecti"e tissue


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Cornea

%ens

A!ueous humor Vitreous body

Components of refractile media ofthe eye


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&efractile 'edia ()ioptric'edia*

Alter the path of li$ht rays byrefraction for them to be focused onthe photoreceptor cells of the retina

Components+cornea# a!ueous humor# lens# "itreous

body


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&efractile 'ediaComponents

Cornea Anterior window of the eye

Chief refracti"e element of the eye

,t has a refracti"e inde- of 1.3/.

%A0E&S (3 cellular# 2 noncellular*+ Corneal epithelium noneratini4ed#

stratied s!uamous

Bowman5s membrane

Corneal stroma

)escemet5s membrane

Corneal endothelium simple# s!uamous


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Corneal %ayers


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&efractile 'edia+ Cornea


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&efractile 'edia+ Cornea


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Corneal endothelium Bowmans membraneStroma


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%ens6ransparent# crystalline# biconca"e

structure suspended from the inner

surface of the by 4onule of 7inn Second in importance to cornea in

refraction of li$ht rays

elastic8 its shape can under$o sli$ht

chan$es6ension of ciliary muscle ACC9'9)A6,9:


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%ens 3 Principal Components+

1. Lens capsule composed of

proteo$lycans and type ,V colla$en8pro"ides the place of attachment for thebers of ciliary 4onule

2. Lens epithelium sin$le layer of cuboidal

cells3. Lens fbers hi$hly elon$ated# terminally

di;erentiated cells that appear as thin#


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A!ueous =umor =as an inor$anic composition similar to

that of plasma but almost no protein

Secreted by ciliary processes intoposterior chamber


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Vitreous Body %ar$e $elatinous mass of transparent

connecti"e tissue

>>? water ("itreous humor*# withcolla$en brils and hyaluronate#contained within an e-ternal laminacalled "itreous membrane

Hyalocytes synthesi4e hyaluronateand colla$en


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6he a!ueous and "itreous body ha"eonly minor roles in refration

=owe"er# A!ueous humor plays important role in

pro"idin$ nutrients to 2 a"ascularstructures# the lens and cornea

6he "itreous body help maintain theposition of the lens and helps eep theneural retina in contact with the &PE

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Histology of the Eye: Chambers & Refractile Media