OCANZ EXAM AND PRACTICE EXAM
NEWEST 2024-2025 ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) |ALREADY
GRADED A+
What is Stargardt disease Correct Answer is the most common
form of inherited juvenile macular degeneration.
Wife calls requesting details on husbands eye test. Do you: get
verbal consent, refuse call, get written consent Correct Answer
get written consent
Diabetic recently diagnosed unstable. Refraction reveals
significant myopic shift compared to last visit 12 months ago.
Which is the most appropriate course of action:
a/ prescribe specs & report to GP
b/ Refer to Ophthalmologist,
c/ Discuss findings with GP before prescribing Rx,
d/ Obtain info on current blood glucose levels Correct Answer c/
Discuss findings with GP before prescribing Rx,
The main cause of amblyopia in a child: anisometropia >2,
accommodative eso, intermittent exo Correct Answer
anisometropia >2,
Which of the following can match Illuminant c: Incandescent,
Halogen, Flourescent, sodium Correct Answer Fluorescent
25 years old enquiring her suitability for laser refractive surgery.
Which of the following is NOT essential pre-operatively:
What is Kolleners rule in relation to colour vision? Correct Answer
outer retinal diseases and media changes result in blue-yellow
color defects
inner retina, optic nerve, visual pathway, and visual cortex will
result in red-green defects.
(increased susceptibility of S-cones and rods to ischaemia and
oxidative damage, although S-cone loss is more noticeable due to
their lower density and their higher metabolic rate) (Kollners rule,
retinal disease will give a blue yellow defect and optic nerve
disease will give a red green defect but the exceptions are
glaucoma which will give a blue yellow defect and central cone
degeneration which will give a red green defect)
Which causes a red defect- red cap test: optic neuritis, Amd
Correct Answer Optic neuritis
Lissamine green; what does it stain? Correct Answer Lissamine
green stains dead and degenerate cells, yet does not stain
healthy epithelial cells.
(NaFl permeates into the intercellular space associated with any
epithelial cellular disruption)
Is gonio indicated with Hyphaema? Correct Answer no
What is prenticies rule? Correct Answer P (prism dioptres =c
(decentration in cm) x F(power of lens in dioptres)
,What is the most preventable cause of AMD? Correct Answer
Smoking
15 years old attends eye examination, best Va's R6/6, L 6/24 (told
ambloypic). Which occuptation should he NOT pursue:
a/ Train driver,
B/ construction worker,
c/ Electrician,
d/ Dentist Correct Answer a/ Train driver
RGP fit with lens riding high and bubbles underneath. What is the
bubbles underneath- name? What is the cause? How would you
change the fit? Rewrite the prescription, base
curve/power/diameter according to change in fit. 0.05 base curve
change the rx by 0.25, 0.5mm diam change etc...all the rules of
thumb Correct Answer DimpleVeil
RGP too steep - reduce total diameter, flatten
Change BOZR by 0.1mm then change power of 0.50D to keep
NaFL pattern?
Increase TD by 0.1mm then flatten BOZR by 0.05mm
Picture of GPC, differential diagnosis, treatment
Treatment method for GPC? Correct Answer improve lens
hygeine
Increase lens replacement frequency
DD if possible
Reduce modulus of lens material (Swap to hydrogel lens, be
aware more difficult to handle)
Manage lid margin disease
If sever - topical Mast cell stabalisers
Colour vision: What careers can you do if you have a defect?
, What is the fail criterion for D15.
What test would you do to confirm ishihara? Correct Answer Fail
criterion is 2 or more diagonal crossings
D15 can classify but not grade severity
63 year old elderly woman with purple loss in vision for past 3
weeks, she is experiencing jaw claudication.
a) What is your diagnosis?
b)What is your systemic and optometric management?
c) Patients prognosis? Correct Answer GCA
evaluating visual acuity, pupils (looking for a relative afferent
defect), intraocular pressures, anterior segment examination,
motility examination (looking for ocular misalignment and/or
evidence of cranial neuropathies), and a dilated fundus
examination (evaluating for signs of optic nerve or retinal
ischemia)
Visual fields testing
ESR (erythrocyte sedimentation rate), high then indicated
inflamation
CRP (C reactive protein) - produced by liver with inflamation
platelets
temporal artery biopsy
prog good if no CRAO or AAION, better prognosis the sooenr
steroids are started
Patient burnt with laser. Management Correct Answer NSAID or
Anti VEGF depending on severity
Name of drops post cataract and percentages post op. Correct
Answer Different ophthals do different things. Ideally you want an
antibiotic eg chloramphenicol for 1 month qid and a steroid eg
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