Exam (elaborations)
PE I Eye
- Institution
- Microbiology Ivy Tech BIOL201
Exam of 16 pages for the course Microbiology Ivy Tech BIOL201 at Microbiology Ivy Tech BIOL201 (PE I Eye)
[Show more]
Seller
Follow
Content preview
PE I Eye-Visual acuity/Visual fields
-Inspection
-Extraocular movements (EOMs)
-Position and alignment
-Pupils
-Ophthalmoscopic exam - ANS-Eye exam
Perform routine eye exams
-Routine physical screening
-Diabetes, hypertension, other systemic disease f/u
Evaluate routine ocular complaints
-Blurry vision
-Eye drainage
Evaluate urgent eye complaints
-Trauma
-Periorbital cellulitis, etc
-Blindness - ANS-Eye Exam in Primary Care
-_____ is continuous with the sclera
- ________ _______: cornea to the iris, canal of Schlemm - ANS-Cornea
Anterior Chamber
-Ensure you have enough light and the proper equipment
-Do not press on or allow your patient to press on his globe
-Obtain appropriate history
--Last eye exam
--Wear glasses or contact lenses
--History of ocular disease
Get in the habit of assessing visual acuity with *ANY* eye complaint - ANS-Technique
points
What does the following stand for?
-OD (oculus _____) right eye
-OS (oculus _______) left eye
,-OU (oculus ______) both eyes - ANS-Dexter
Sinister
Uterque
Use wall chart or card:
-Snellen eye chart: stand __ ____ from chart
-Pocket card: should be __ _____ from eyes
-Test patient *with correction,* if worn (and note this)
-Test each eye separately, then together (OD/OS/OU)
Have patient read the smallest line in which they can identify more than half the letters -
ANS-20 feet
14 inches
Record as a notation, e.g. 20/20
-__: distance from chart (feet)
-__: distance a normal eye can read the line
-eg; 20/40 means the patient can read at 20 feet what a normal eye can at 40 feet -
ANS-N
D
If a visual acuity of 20/20 is achieved, then a refractive error is present. If not, _______
must be considered. Any child with a visual acuity in either eye of 20/__ or worse at
*age three to five* years or 20/__ or worse at *six years or older,* *or a two-line
difference in acuity between the two eyes,* should be referred to an ophthalmologist for
further evaluation - ANS-Amblyopia
20/40
20/30
What if patient cannot see largest letter?
What if they cannot see the big E at 3 feet? - ANS-Walk the patient toward the chart
until they see the big E.
Record as 10/200 (the 20/200 letter at 10 ft)
If patient unable to see big E at 3 feet, try:
, -Count fingers
-Hand motion
-Light perception
->20/200: legal blindness
-Purpose is to screen for visual field defect
-A visual field is the entire area seen by an eye when it looks at a central point
-Visual fields normally limited by the brows above, the cheeks below, and the nose
medially
-A lack of ______ _______ at the optic disc produces an oval blind spot in the normal
field of each eye, 15 degrees temporal to the line of gaze. - ANS-Visual Fields by
Confrontation, Retinal Receptors
-Imagine the patients visual fields projected onto a glass bowl that encircles the front of
the patients head
-Ask them to look with both eyes into your eyes.
-While you return the patients gaze, place your hands about 2 feet apart, lateral to the
patients ears
-Instruct the patient to point to your fingers as soon as they are seen
-Then slowly move the wiggling fingers of both your hands along the imaginary bowl
and toward the line of gaze until the patient identifies them
-Usually a person sees both sets of fingers at the same time - ANS-Visual Fields by
Confrontation
-If you find a defect, try to establish its boundaries
-Test one eye at a time several times and try to define the border of the defect
-Review different patterns of visual field defects (Table 6-4, pg. 212). Give three
examples: - ANS--Homonymous hemianopsia
-Bitemporal hemianopsia
-Quadratic defects
*A lesion at the Optic chiasm* may involve only fibers crossing over to the opposite
side. Since these fibers originate in the nasal half of each retina, visual loss involves the
temporal half of each field. - ANS-Bitemporal Hemianopsia
*A lesion of the optic tract* interrupts fibers originating on the same side of both eyes.
Visual loss in the eyes is therefore similar (homonymous) and involves half of each field
(hemianopsia). - ANS-Homonymous Hemianopsia (Right Optic tract)
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller lydiaomutho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £6.18. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73314 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now