Mod 3 Flashcards
What are the external structures of the eye?
Eyelids Lateral and medial canthus Eyelashes, conjunctiva Lacrimal apparatus Extraocular muscles
What are the internal structures of the eye?
Sclera, cornea, iris, ciliary body Pupil (3 to 5 mm) lens, choroid, retina, optic disc Physiologic cup, retinal vessels Anterior chamber, posterior chamber
What are risk factors for Cataracts?
Increasing age – developing at 30 years of age Exposure to ultraviolet B light Diabetes mellitus Cigarette smoking Alcohol use Diet low in antioxidant vitamins High blood pressure Eye injuries/surgery Steroid use Female gender Persistent diarrhea Gout Abdominal obesity Beta blocker use
What can you due to reduce risk for Cataracts?
Wear sunglasses Quit smoking Limit alcohol intake Avoid eye injuries Regular eye examinations
What is Cataracts?
clouding of the usually clear lens of the eye, causing a person to see as though looking through a frosty or foggy window.
What is Glaucoma?
an acute or chronic condition in which there is an increase of IOP which leads to damage of the retina and optic nerve, with resulting visual field loss.
What is referred to as the “silent thief of sight”
Glaucoma
What is Macular Degeneration?
age-related macular degeneration is the primary cause of vision loss in older adults. Does not affect peripheral vision. Affects ventral vision, color perception and fine detail which affects reading, driving and seeing faces.
What is Diabetic Retinopathy?
occurs in both type 1 & type 2 diabetes. Caused by changes in the small blood vessels in the retina. Changes in the microvasculature include microaneurysms, intraretinal hemorrhage, hard exudates, and focal capillary closure. Is painless
What are sign and symptoms of Glaucoma?
gradual loss of peripheral vision, blurred vision, “halos” around lights, difficulty focusing, difficulty adjusting eyes in low lighting, loss of peripheral vision, aching or discomfort around the eyes and/or headaches
What are sign and symptoms of Macular Degeneration?
blurred vision, straight lines which appear crooked
What are sign and symptoms of Diabetic Retinopathy?
floaters or cobwebs in the visual field, sudden visual changes including spotty or hazy vision or complete loss of vision. Many patients are asymptomatic
What is the leading cause of blindness worldwide?
Cataracts
What equipment will you need for a physical assessment of the eyes?
Snellen or E chart Hand-held Snellen card or near-vision screener Penlight Opaque cards Ophthalmoscope
What score is normal for distant acuity with or without corrective lenses?
20/20
How do you get the top number of a visual acuity score?
By how many feet the client is from the chart ex. 20/20 is 20 ft from the eye chat
How do you get the bottom number of a visual acuity score?
It is the number found on the chart row of the smallest print that the patient can read.
What score is normal for near acuity with or without corrective lenses?
14/14
What is associated with optic atrophy, glaucoma, or Vitamin A deficiency?
Night blindness
What is diplopia?
Double vision which may indicate increased ICP due to an injury or tumor.
While assessing extraocular muscle function how would you conduct the corneal light reflex test?
use penlight to observe parallel alignment of light reflection on corneas. Asymmetric position of the light reflex indicated deviated alignment of the eyes, possibly due to muscle weakness or paralysis.
While assessing extraocular muscle function how would you conduct the Cover test?
use opaque card to cover an eye to observe for eye movement. Tests for deviations in alignment or strength or slight deviations in eye movement
While assessing extraocular muscle function how would you conduct the Positions test (6 Cardinal Fields of Gaze)?
observe for eyes to follow movement symmetrically. Assesses eye muscle strength and cranial nerve function.
During physical inspection of the eyelids and eyelashes you notice drooping of the upper lid may be due to oculomotor nerve (CN II) damage, myasthenia gravis, weakened muscle tissue or damage, or congenital disorder what is it?
Ptosis
while you observe the position and alignment of the eyeball in the eye socket you notice protrusion of the eyeballs accompanied by retracted eyelid marginsIs this characteristic of Graves’ disease and recognize it as what?
Exophthalmos
Redness or swelling around the puncta may indicate what?
an infectious or inflammatory condition
while palpate the lacrimal apparatus you expressed drainage from the puncta this indicates what?
blockage of the duct
Unequal size in the iris and pupil is always what kind of finding?
abnormal
What test pupillary reaction to light?
Direct -shine a light on the pupil and watch for it to constrict Indirect –shine a light on the left pupil and watch for the right pupil to constrict
How do you test accommodation of pupils?
Accommodation of pupils occurs when the client moves focus of vision from far to near, causing the pupils to constrict. Normally, pupils constrict when they focus on a near object and dilate on a distant object.
How do you test test convergence ?
ask the client to maintain focus on your finger as you move it from 6 inches in front of her face to the tip of her nose. Watch for eyes to converge, or “cross” medially.
Pupillary constriction in response to indirect light is known as what?
consensual response
list abnormalities of the external eye
Ptosis Exopthalmos Entropion Ectropion Chalazion Blepharitis Conjunctivitis Diffuse episcleritis Hordeolum
Optic nerve discs are larger in what nationality?
blacks, Asians, and Native Americans
what are common Nursing Diagnoses for an eye assessment?
Ineffective Health Maintenance R/T a lack of knowledge of necessity for eye examinations Self-care Deficit (must specify the deficit) related to poor vision Acute Pain R/T injury from eye trauma, abrasion, or exposure to chemical irritant Social Isolation R/T inability to interact effectively with others secondary to vision loss
Though usually abnormal, entropion and ectropion are common in who?
older adults
any reports of blind spots require what?
Immediate medical attention
when testing pupillary reaction to light what should you expect?
pupils are 3mm and equal in size
Presbyopia is common in who?
adults over 45
what are external structure of the ear?
pinna-external ear
external auditory canal-the external auditory canal is S-shaped in the adult
Tympanic membrane-has a translucent pearly gray appearance.
To examine the external auditory canal you must do what?
pull the auricale upward and back
what do the modified sweat glads in the external auditory cannal serete and what is purpose?
cermen and to keep the tympanic membrane soft which also has bacteriostatic properties that serves as as defense against foreign bodies