Term
| Overall Eye plan and structure |
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Definition
Nervous Layer(retina): Vision
Vascular Coat(Uvea): Nutrient Supply
Fibrous Coat(sclera and Cornea): Protect |
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Term
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Definition
tendons insert into scelera.
Episcleral tissue - loose ct - permits movement of eye
Substantia propria: Flat collagenous bundles parrallel to the surface |
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Term
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Definition
Epithelium
Bowman's Membrane
substantia propria(corneal stroma)
descemet's membrane
endothelium |
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Term
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Definition
Stratified, Squamous.
Regenerative
Numberous Nerve Endings. Pain/Blink |
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Term
| Corneal Bowman's membrane |
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Definition
| serves as a protective barrier, resistant to trauma and bacterial invasion |
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Term
| Substantia Propria(Corneal stroma) |
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Definition
90% of cornea.
parallel bundles of collagenous fibres
fibroblasts, leukocytes |
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Term
| Corneal Descemets membrane |
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Definition
contains atypical collagen
essentially thick basement membrane |
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Term
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Definition
simple squamous/cuboidal
Receives nutrients from aqueous humor |
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Term
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Definition
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Term
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Definition
Epichoroid:elastic fibers, pigmented cells
Vessel Layer: Capillaries, Pigmented Cells
Bruchs Membrane: Shiny, homogenous basement membrane and elastic fibers.
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Pigment Epithelium
nervous retina |
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Term
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Definition
Ciliary Muscle - 3 layers smooth muscle
Vascular Layer
Bruchs membrane - (2 layers)
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Pigment Epithelium(simple cuboidal)
Ciliary Epitherlium(simple cuboidal) |
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Term
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Definition
Epithelium-(continuous with corneal endothelium)
Constrictor(sphintor) muscle-circularly arranged
Anterior Stroma- pigmented cells
General Stroma - C.T., Vascular
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Dilator muscle- Radial,posterior-myoepithelial
Pigmented Epithelium |
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Term
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Definition
Produced by ciliary processes through diffusion from capillaries.
Normal Pressure 10-22mm. Higher leads to glaucoma. less blood flow to retina
Drainage: Trabecular meshwor, Canal of schlemm > aqueous vines. |
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Term
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Definition
Capsule - contains collagenous fibrils- elastic
Epithelium - Simple Cuboidal on anterior surface. Transform to lens fibres at equator
Lens substance : Lens Fibers- 6 sided prisms. Cells lose nuclei and organelles. fill with crystallins.
held together by transparent cementing substance which provides movement during accommodation.
Lens substance |
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Term
| Zonule(suspensory ligament) |
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Definition
Passes from ciliary processes to equator of lens. Thin collagenous fibrils
Ciliary Muscle contracts, tension on zonule decreases on lens thickens
Refractive power increases when ciliary muscle contracts |
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Term
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Definition
transparent semisolid gel. Supports Retin
99% water. Hyalocytes produce collagen and hyaluronic acid.
Hyloid membrane - surface condensation of collagen fibrils.
hyaloid canal - vestige of hyaloid artery |
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Term
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Definition
Pigment Epithelium
Rods and Cones
Outer Limiting membrane
outer nuclear layer
outer plexiform layer
inner nuclear layer
inner plexiform layer
ganglion cell layer
nerve fiber layer
inner limiting membrane |
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Term
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Definition
Pigment Epithelium
Rods and cones - Contains Discs of rods and cones.
Outer Limiting membrane- Juction between Muller cell and photorecptors
Outer Nuclear Layer- Contains rod and cone cell bodies and nuclei. Cone have single layer |
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Term
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Definition
Outer Plexiform - Axons of rods and cones. dendrites of bipolar. processes of horizontal cells.
Inner nuclear(bipolar) Layer - bipolar cells, horizontal cells, amacrine cells.
inner plexiform layer- contains axons of bipolar cells. dendrites of ganglion |
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Term
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Definition
Ganglion cell layer - contains cell bodies of ganglion cells. 1 cell thick usually
nerve fiber layer - contains unmyelinated axons of ganglion cells. retinal vessels
Inner limiting membrane - basal lamina |
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Term
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Definition
Rods are long and cylindrical. Night Vision. Vitamin A.Rod discs shed and are absorbed. retinitis pigmentosa when not.
Cones. Little turnover in discs.
Wave lenght discrimination. |
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