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Visual and Auditory SystemsMedical-Surgical Nursing-7th edition

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The _______ conjunctiva covers the sclera.
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Bulbar
What do glands of the conjunctiva secrete?
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Mucus and tears
The ________ is composed of collagen fibers meshed together to form an opaque structure referred to as the white of the eye.
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Sclera
The ______ forms a tough shell of collagen fibers that helps protect the intraocular structures of the eye.
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Sclera
What are the five layers of the cornea?
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The epithelium, Bowman's layer, the stroma, Descemet's membrane, and the endothelium.
The stroma of the cornea is comprised of ______.
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Collagen fibrils
What are the components of the lacrimal apparatus?
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The lacrimal glands and ducts, lacrimal canals and puncta, the lacrimal sac and the nasolacrimal sac.
What are the extraocular muscles of the eye?
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The superior and inferior rectus muscles, the medial and lateral rectus muscles, and the superior and inferior oblique muscles.
_______ movement is a simultaneous movement of two structures in the same direction, as with the eyes.
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Conjugate
What is the pathway of tears produced in the lacrimal apparatus?
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The tears pass over the surface of the eye and enter the lacrimal canal. The tears travel through the lacrimal sac and then into the nasolacrimal duct to the nasal cavity.
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The ______ provides the color for the eye.
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Iris
The pupil of the iris constricts via action of the iris sphincter muscles which is innervated by CN _____ and dilates via the action of the iris dilator muscle that is innervated by CN ______.
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Constricts= CN III-oculomotor nerve Dilates = CN V-trigeminal nerve
The _____ is a biconvex, avascular, transparent structure located behind the iris.
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Lens
The _______ is a highly vascular structure that serves to nourish the ciliary body, iris and the outer portion of the retina.
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Choroid
The _______ is the innermost layer of the eye that extends and forms the optic nerve. It is mostly made of neurons.
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Retina
Blepharo-dermachalasis is a condition seen in elderly patients that presents as...
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Excessive upper eyelid skin
Small yellowish spots located on the medial aspect of the conjunctiva are called...
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Pinguecula
What color are the sclera in the elderly population?
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Yellow from lipid deposition (usually they are bluish)
A milky or yellow ring encircling the periphery of the cornea is called...
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Arcus senilis
What causes arcus senilis?
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Cholesterol deposits in the peripheral cornea
A thickened, triangular bit of pale tissue that extends from the inner canthus of the eye to the nasal border of the cornea is called...
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Pterygium
  
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