Assessment of the Visual System-F23

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College of the Sequoias *

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144

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Nursing

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Apr 29, 2024

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docx

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7

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NURS 144 Pre-Class Assignment Assessment of the Visual System 1. Use the following terms to fill in the labels in the illustration below: Terms Anterior Chamber Optic Nerve Choroid Posterior Chamber Ciliary Body Pupil Cornea Retina Iris Sclera Lens Vitreous Humor Optic Disc A. Lens H. Vitreous Humor B. Iris I. Optic Disc C. Cornea J. Optic Nerve D. Anterior Chamber K. Retina E. Pupil L. Choroid F. Posterior Chamber M. Sclera G. Ciliary Body 1
2. What is in the posterior cavity of the eye? a. Zonules c. Aqueous humor b. Cornea d. Vitreous humor 3. What is the function of the sclera? a. Secrete aqueous humor b. Focus light rays on the retina c. Protect outer layer of the eyeball d. Photoreceptor cells stimulated in dim environments 4. What accurately describes the conjunctiva? a. Junction of the upper and lower eyelids b. Point where the optic nerve exits the eyeball c. Transparent mucous membrane lining the eyelids d. Drains tears from the surface of the eye into the lacrimal canals 5. Which tissue nourishes the ciliary body, iris, and part of the retina? a. Pupil c. Choroid b. Cones d. Canal of Schlemm 2
6. Identify the cranial nerves that are responsible for the following eye functions. Eye Function Cranial Nerve Eyelid movement, open and close Cranial Nerve III (Oculomotor) Pupil constriction Cranial Nerve III (Oculomotor) Pupil dilation Cranial Nerve III (Oculomotor) Visual acuity Cranial Nerve II (Optic) 7. Identify the causes of the following assessment findings of the eye that are associated with aging. Assessment Finding Cause Floaters Changes in the vitreous humor Ectropion Weakening of the eyelid muscles and tissues Pinguecula It’s thought to be caused by exposure to sun, wind, and dust Arcus senilis Fat deposits in the cornea Yellowish sclera Jaundice, aging-related changes in the collagen of the sclera Dry, irritated eyes Reduced tear production Decreased pupil size Decreased muscle tone or inflammation in the iris, drugs, harsh chemicals Changes in color perception Aging-related changes in the lens and retina, different conditions such as diabetes, glaucoma, or macular degeneration. 8. Priority Decision: When obtaining a health history from a patient with cataracts, it is most important for the nurse to ask about the patient’s use of which drug? 3
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