NR 325 EXAM 2 RUNNING REVIEW

NR325Running Review Week 3 1 2/9/2021 NR 325 EXAM 2 RUNNING REVIEW WEEK 3 1. Ch. 20: Nursing Assessment: Visual and Auditory Systems a. Terms & Concepts i. Astigmatism-uneven curvature of the cornea, which results in visual distortion ii. Color blindness-deficiency in way you see color, difficulty distinguishing certain colors (blue & yellow or red & green-most common) iii. Conjunctiva-transparent mucous membrane that covers the inner surfaces of the eyelids and also extends over the sclera, forming a “pocket” under each eyelid iv. hyperopia-farsightedness, can see distant objects clearly, but close objects in distance are blurred v. lens-biconvex, avascular, transparent structure located behind iris vi. myopia-nearsightedness, can see near objects clearly, but blurry for distance objects vii. nystagmus-abnormal eye movement that may be observed as a twitching of the eye ball or described by the patient as a blurring of vision with head or eye movement viii. presbycusis-hearing loss due to aging, can result from a variety of sources ix. presbyopia-loss of accommodation, causing an inability to focus on near objects, manifestations appear around 40 x. refraction-eyes ability to bend light rays so that they fall on the retina xi. retina-innermost layer of the eye that extends and forms optic nerve xii. sclera-composed of collagen fibers meshed together to form an opaque structure commonly referred to as the “white” of the eye xiii. tinnitus-ringing in the ears (may accompany the hearing loss that results from aging process) xiv. vertigo-sense that the person or objects around the person are moving or spinning and is usually stimulated by movement of the head 1. Anticholinergic/antiemetic 2. Nystagmus-abnormal eye movement that may be observed as a twitching of the eye or blurring of vision with head or eye movement b. A&P of vision i. Aqueous humor-a clear watery fluid, fills the anterior and posterior chambers of the anterior cavity of the eye; produced from capillary blood in the ciliary body ii. Lens-biconvex, avascular, transparent structure located behind the iris; primary function to bend light rays so that they focus on retina