Term
| what are the three tunica coats the eye is divided into? |
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Definition
fibrous
vascular
sensory (retina) |
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Term
| what are the two different regions of the fibrous tunic? |
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Definition
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Term
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Definition
| means "hard", white, forms posterior and majority (85%) of fibrous tunic, anterior part covered by simple squamous epeithilium called conjunctiva |
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Term
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Definition
| anterior portion of fibrous tunic (15%), regular arrangement of collagen fibers make it crystal clear, many pain fibers, fibers associated with relfex blicking and lacrimal secretion, no vessels, derives nutrients from aqueous humor |
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Term
| what does the vascular tunic consist of? |
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Definition
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Term
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Definition
| highly vascular, dark brown (contains melanin), continuous anteriorly with ciliary body and iris |
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|
Term
| what are the three tunica coats the eye is divided into? |
|
Definition
fibrous
vascular
sensory (retina) |
|
|
Term
| what are the two different regions of the fibrous tunic? |
|
Definition
|
|
Term
|
Definition
| means "hard", white, forms posterior and majority (85%) of fibrous tunic, anterior part covered by simple squamous epeithilium called conjunctiva |
|
|
Term
|
Definition
| anterior portion of fibrous tunic (15%), regular arrangement of collagen fibers make it crystal clear, many pain fibers, fibers associated with relfex blicking and lacrimal secretion, no vessels, derives nutrients from aqueous humor |
|
|
Term
| what does the vascular tunic consist of? |
|
Definition
|
|
Term
|
Definition
| highly vascular, dark brown (contains melanin), continuous anteriorly with ciliary body and iris |
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Term
| describe the ciliary body? |
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Definition
| has bundles of smooth muscle, contains suspensory ligaments, tension on ligaments causes lens to flatten, when ligaments relax the lens get thicker due to internal elasticity, contains ciliary process |
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Term
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Definition
| connect ciliary body to lens |
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Term
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Definition
| highly vascularized portion of ciliary body that produces aqueous humor |
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Term
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Definition
| visible colored part of eye, located between lens and cornea, forms central opening called the pupil, acts as reflexively activated diaphragm, in bright light, smooth muscle of iris contract causing pupil to constrict, constriction/dilation also controlled by sympathetic (dilaton) and parasympathetic (constriction) fibers |
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Term
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Definition
| where light enters the eye |
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Term
| what does the sensory tunica (retina) consist of? |
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Definition
| neural/nervous layer, photoreseptors, bipolar cells, ganglion cells, horizontal cells, amacrine cells, optic disc, fovia |
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Term
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Definition
| direct mediator of vision, transparent |
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Term
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Definition
| light passes through here, there are no photoreceptors in the optic disc which is why it's the blind spot, |
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Term
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Definition
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