Ch. 15 (Assessment of Eyes) Flashcards
What part of the external eye anatomy is a transparent protective covering that lines the eye?
conjunctiva
What part of the external eye anatomy helps directs the eyes as a pair?
extraocular muscles
What cranial nerves are responsible for extraocular muscles?
- CN III
- CN IV
- CN VI
When bright line is shone into the eye, what does the pupil do?
constricts
What cranial nerve is responsible for the pupil constricting?
CN III
tested via pupillary light reflex
What do you see when you look through the opthalmoscope?
the fundus of the eye
What part of the fundus in the eye contains fibers from the retina that converge together to form the optic nerve?
optic disc
When looking into an opthalmoscope, the optic disc in the right eye will be where in the fundus?
nasal side (left)
When looking into an opthalmoscope, the optic disc in the left eye will be where in the fundus?
nasal side (right)
Where do we have our most central focused vision in the eye?
the macula
Where is the macula located?
temporal side of the fundus
When one eye ellicits the pupillary light reflex, what causes the other eye to also constrict?
consensual light reflex
What causes the eye to adapt for near vision?
accomodation
What kind of subjective data do we collect during a health history on the eye?
- vision difficulty
- pain (usually needs to be referred right away if its sudden)
- strabismus/diplopia (double vision)
- redness/swelling
- watering/discharge
- previous hx eye problems
- glaucoma
- use of glasses/contacts
- self care behaviors
- meds
- coping mechanism from vision loss
How can vision change during aging as an adult?
- glaucoma (lose peripheral vision, halos)
- cataracts (foggy)
- macular degeneration (central vision)
When assessing central visual acuity during examination of the eye, what test do we perform?
snellen
When performing the snellen on a patient, what should you note?
the last successful line the patient can read wiht >50% accuracy
How do you interpret snellen results?
the greater the denominator, the worse the vision
When recording snellen results in the chart, what would you write down?
The patient can see at __numerator__ what someone with normal vision can see at __denominator__.
When recording snellen results in the chart, what would you write down if their results are 20/200?
The patient can see at 20 what someone with normal vision can see at 200.
When a patient has a decrease power of lens due to accommodation with aging, what would that be called?
presbyopia
How do you test near vision in a patient?
have them hold a vision screener or newspaper
What kind of test takes gross measurements of perpherial visions?
confrontation test
What type of extraocular movement test checks the parallel alignment of the eye axis?
corneal light reflex
