Term
| what are the 3 layers of the eye |
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Definition
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Term
| sclera: structure that covers anterior 1/6 of the eye |
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Definition
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Term
| sclera: covers posterior 5/6 of the eye, white appearance |
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Definition
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Term
| sclera: structure that continues with the sclera, covres the optic disc |
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Definition
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Term
| choroid: contraction of the choroid muscle results in what |
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Definition
| relaxes the zonular ligaments of the lens and allows the lens to revert to its normal convex shape |
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Term
| choroid: relaxation of the ciliary muscles results in what |
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Definition
| tension on the zonular ligaments and pulls the lens into a less convex shape |
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Term
| retina: structure that underlies the ciliary body |
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Definition
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Term
| what are the 2 parts of the retina |
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Definition
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Term
| what is the role of the secretory retina |
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Definition
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Term
| the interior eye has 3 regions what are they |
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Definition
| anterior chamber, posterior chamber, vitreous body |
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Term
| area found anterior the lens and pupil |
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Definition
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Term
| area found between the lens/pupil and the ciliary body |
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Definition
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Term
| what is the role of hte lens |
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Definition
| focues images on the retina |
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Term
| the secretory retina produces aqueous humor and is secreted into where |
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Definition
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Term
| from the posterior chamber where does aqueous humor go |
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Definition
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Term
| from the anterior chamber where does aqueous humor go |
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Definition
| into the canal of schlemm |
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Term
| from the canal of schlemm where does aqueous humor go |
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Definition
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Term
| what is the role of aqueous humor |
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Definition
| nourish and hydrate the lens |
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Term
| how often does aqueous humor turn over |
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Definition
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Term
| condition characterized by increased intraocular pressure due to aqueous humor being produced faster than it is resorbed |
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Definition
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Term
| increased pressure from glaucoma can cause loss of vision by restricting blood flow to what |
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Definition
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Term
| what is the role of the drugs used to treated glaucoma |
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Definition
| cause pupillary constriction which opens up the canal of schlemm to improve drainage of aqueous humor |
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Term
| gelatinous body filling the back of the eye |
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Definition
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Term
| the retina has a 3 neuron chain, name them in order |
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Definition
| rod and cones, bipolar cells, ganglion cells |
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Term
| there is no convergence of what receptor on ganglion cells |
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Definition
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Term
| there is significant converge of what receptor on ganglion cells |
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Definition
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Term
| ganglion cells are _______ in the retina |
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Definition
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Term
| these cells are association neurons |
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Definition
| amacrine and horizontal cells |
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Term
| general term for the back of the eye |
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Definition
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Term
| structure of the retina, origin of the optic nerve |
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Definition
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Term
| blind spot that lacks rods and cones |
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Definition
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Term
| structure of teh fundus that lies nasal to the fovea centralis |
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Definition
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Term
| if intracranial pressure is elevated, it may result in elevated compression of what |
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Definition
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Term
| if intracranial pressure is elevated compression of the central retinal vein in what? |
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Definition
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Term
| if intracranial pressure is elevated, compression of the central retinal vein in the optical nerve may inhibit venous drainage elading to what |
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Definition
| papilledema: swelling of the optic disc |
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Term
| papilledma can be observed during examination of teh fundus with what |
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Definition
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Term
| structure of the fundus, lies at the back of the eye in direct line with the visual axis |
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Definition
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Term
| structure that lies in the center of the macula and contains only small cones |
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Definition
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Term
| area of highest visual acuity, these cells maintain a point to point projection to the cortex |
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Definition
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Term
| visual pathways: nasal fibers enter the optic chiasm and tract do what |
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Definition
| cross to contralateral side |
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Term
| visual pathways: temporal fibers enter the optic chiasm and tract and do what |
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Definition
| stay on the ipsilateral side |
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Term
| visual pathways: after the optic chiasm and tract where do most fibers synapse |
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Definition
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Term
| visual pathways: after the otpic chiasm and tract where do SOME fibers go |
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Definition
| directly enter the brainstem to mediate reflexes |
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Term
| what are teh 2 parts of teh lateral geniculate body |
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Definition
| medial and lateral halves |
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Term
| how many layers does the lateral geniculate body have |
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Definition
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Term
| visual pathways: fibers from the lateral geniculate body enter what |
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Definition
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Term
| visual pathways: fibers from the LGB enter the optic radiations and do what |
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Definition
| sweep around the lateral side of the lateral ventricle and pass to the occipital lobe |
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Term
| visual pathways: the fibers that pass from the LGB to optic radiations and pass to the occipital lobe are called what |
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Definition
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Term
| visual pathways: fibers carrying information from the upper retina are found in what part of the optic radiations |
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Definition
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Term
| visual pathways: fibers carrying information from the upper retina are found in the upper regions of the the radiations and traverse what lobe |
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Definition
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Term
| visual pathways: fibers carrying information from the upper retina are found in the upper region of the optic radiations and traverse the parietal lobe to terminate where |
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Definition
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Term
| visual pathways: fibers representing the lower retina traverse which region of the optic radiations |
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Definition
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Term
| visual pathways: fibres representing the lower retina traverse the lower region of the radiations and traverse what next |
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Definition
| sweep anteriorly into the temporal lobe |
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Term
| visual pathways: fibers represnting the lower retina traverse the lower region of the radiations and sweep anteriorly into the temporal lobe and then |
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Definition
| curve over the tip of the temporal horn of the lateral ventricle and then pass posteriorly |
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Term
| visual pathways: fibers represnting the lower retina traverse the lower region of the radiations and sweep anteriorly into the temporal lobe and curve over the tip of the temporal horn of the lateral ventricle and then pass posteriorly into what |
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Definition
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Term
| Loop of Meyer contains fibers represnting what |
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Definition
| contralateral lower nasal retina, ipsilateral temporal retina |
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Term
| brodmann's area for the primary visual cortex |
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Definition
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Term
| where is the primary visual cortex located |
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Definition
| above and below the calcarine sulcus |
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Term
| fibers represnting the upper retina terminate ____ the calcarine suclus in the ______ |
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Definition
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Term
| fibers representing the lower retina terminate _____ the calcarine suclus in the ______ |
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Definition
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Term
| primary visual cortex is characterized by what |
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Definition
| line of gennari/striate cortex |
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Term
| line of gennari represents what |
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Definition
| termination of projections from the lateral geniculate body |
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Term
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Definition
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Term
| a lesion of the optic nerve will result in what |
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Definition
| ipsilateral monocular visual loss |
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Term
| a lesion of the optic chiasm will result in what |
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Definition
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Term
| a lesion of the optic tract will result in what |
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Definition
| contralateral homonymous hemianopia |
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Term
| a lesion of teh upper portion of the loop of meyer will result in what |
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Definition
| contralateral superior quadrant anopia |
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Term
| a lesion of teh lower portion of the loop of meyer will result in what |
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Definition
| contralateral inferior quadrant anopia |
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Term
| a lesion of the optic radiation will result in what |
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Definition
| contralateral homonymous anopia |
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