Exam (elaborations)
OCANZ Quiz Tim: Questions & Answers
- Course
- Institution
OCANZ Quiz Tim: Questions & Answers
[Show more]
Seller
Follow
Victorious23
Reviews received
Content preview
OCANZ Quiz Tim: Questions & AnswersList and briefly discuss the major causes of visual impairment in Australia.
List and briefly discuss the major causes of visual impairment in developing
countries. - -In Australia
1.AMD cause of 50% of all blindness-less common in developing countries
due to lower life expectancy
2.Glaucoma- 16% of blindness
3.Cataract-11% of blindness
3. Diabetic retinopathy (+ other= 20%)- Most common cause of visual
impairment in working age population
4. 3% uncorrected refractive error
Developing countries -uncorrected refractive errors, cataract- unavailable
surgery, trachoma- river water parasite, glaucoma
-A teenage male attends your practice because he knows he is colour
defective and he has been told that there are some professions where
restrictions are placed on those with a colour vision problem. What advice
would you give this patient? - -Careers with strict restrictions: ARMED
SERVICES
POLICE
AIR TRAFFIC CONTROLER
FIRE SERVICES
Also have restrictions but candidate can work within some divisions:
COMMERCIAL PILOT
MARINE and MARINE PILOT etc;
TRAIN DRIVER
ELECTRICIAL ENGINERING
ELECTRICAL TRADES
COMMERCIAL ARTIST, HOSPITAL LABORATORY TECHNICIANS
PROFFESSIONAL TRANSPORT DRIVER- don't accept protanomaly- do accepy
deuteranomoly
-Indicate the review cycle you would recommend for the following patients
including your rationale behind the review cycle suggested
a) a patient with mild background retinopathy annual review - -annual
review
-Indicate the review cycle you would recommend for the following patients
including your rationale behind the review cycle suggested
,a patient from whom you have just removed a superficial corneal foreign
body - -1/52 to check for signs of infection/inflammation and healing process
-Indicate the review cycle you would recommend for the following patients
including your rationale behind the review cycle suggested
A patient with a branch retinal vein occlusion - -3/12 review- check for '90-
day glaucoma' rubeosis iridis/neovascularistion and macular oedema
-Indicate the review cycle you would recommend for the following patients
including your rationale behind the review cycle suggested
a 6 year old child with hypermetropia and an alternating esotropia wear full
cycloplegic rx - -review in 6 months if no amblyopia
-Indicate the review cycle you would recommend for the following patients
including your rationale behind the review cycle suggested
a patient with optic nerve head drusen - -3 years with medicare?
-Discuss the indications for gonioscopic assessment of a patients' anterior
chamber angle. Describe the structures you will see if the angle is open.
(Open to closed) - -increased IOPs, CAG symptoms, retinal vein/artery
occlusions, pseudoexfoliation/PDS, pxs with glaucoma, anterior uveitis pxs
with inc. IOPs, before dilation if van herick < grade 2
ciliary body, scleral spur, Anterior/ posterior trabecular meshwork, schwalbes
line,
-Central visual field testing has an important role in the diagnosis of
glaucoma.
What type of central field test would you use for a patient who was a
glaucoma suspect?
How would you determine whether the test was reliable?
What information would you concentrate on in the printout to help decide as
to whether the patient had glaucoma? - -Humphreys visual field analyser-
c24-2 full threshold
Fixation losses <20%
False positives <33%
False negatives < 33%
Glaucoma hemifield test, total deviation, pattern deviation type of loss
present- paracentral, arcuate, nasal step, generalised depression, temporal
wedge
, -Discuss the ophthalmic drugs most commonly used for dilation. Include in
your answer their mode of action, duration and side effects. What patients
should not be dilated? - -Tropicamide 1%< anticholinergic, 4-6 hours risk of
CAG, blurred vision,photophobia
Cylopentalate 1%< anticholinergic - 12-24hours risk of CAG, blurred
vision,photophobia
Atropine 1%<
Homatropine 2%<
Pxs with iris fixed IOLs or pxs at risk of angle closure, pxs with known
allergies to mydriatic agents, downs syndrome pxs?
-Define stereopsis. How would you measure stereopsis? What are normal
values? - -the perception of depth produced by the reception in the brain of
visual stimuli from both eyes in combination, combining areas in panums
fusional area.
TNO dependent on age
5 years, 140 seconds:
5 1/2 years, 100 seconds;
6 years, 80 seconds;
7 years, 60 seconds;
9 years, 40 seconds.
-Describe how you would assess whether a patient was suppressing an eye.
- -Check if Vas are equal/ history of
amblyopia/strabismus/surgery/patching/cover test are all useful factors to
consider. Main test of suppression is worths 4 dot- if only 2-3 dots are seen
then one eye is supressed i.e eye with red filter should see green dots, eye
with green filter shot see red dot/ if unavailable can use mallet unit-
polarisation filter means one eye sees 12 and 3 o'clock lines, one eye sees 6
and 9 o'clock lines. If one eye is suppressed only 2 of the four lines will be
visible.
-Dry eye is a common disorder of the tear film caused by tear deficiency or
excessive tear evaporation. What are the major causes of dry eye and how
should dry eye be assessed? - -Causes of dry eye are related to:
• poor tear quality; i.e deficient lipid layer (MGD dysfunction- cause of 50%
of dry eye), deficient mucous layer (e.g stevens-johnson syndrome which
effects goblet cells)
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 or Stuvia-credit 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 Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now