OCANZ LATEST EXAM UPDATED 2024 WITH VERIFIED QUESTIONS AND ANSWERS (GRADED A+)
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Course
OCANZ
Institution
OCANZ
OCANZ LATEST EXAM UPDATED 2024
WITH VERIFIED QUESTIONS AND
ANSWERS (GRADED A+)
What is Kolleners rule in relation to colour vision? - ANSWER-outer retinal diseases and
media changes result in blue-yellow color defects
inner retina, optic nerve, visual pathway, and visual cortex will result...
OCANZ LATEST EXAM UPDATED 2024 WITH VERIFIED QUESTIONS AND ANSWERS ( GRADED A+ ) What is Kolleners rule in relation to colour visio n? - 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 oxidativ e 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 glaucom a 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 - ANSWER -Optic neuritis Lissamine green; what does it stain? - ANSWER -Lissamine green st ains 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? - ANSWER -no What is prenticies rule? - ANSWE R-P (prism dioptres =c (decentration in cm) x F(power of lens in dioptres) What is the most preventable cause of AMD? - 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 - ANSWER -a/ Train driver 25 year old with stargardts disease requests assistance with reading tasks, lighting at work and travel, which of the following professional below will assist him - occuptational therap ist, orientation instructor, phsycologist & GMP, Physiotherapist & Rehab, Social worker & Ophthalmologist - ANSWER - What is Stargardt disease - ANSWER -is the most common form of inherited juvenile macular degeneration. Wife calls requesting details o n husbands eye test. Do you: get verbal consent, refuse call, get written consent - ANSWER -get written consent Diabetic recently diagnosed unstable. Refraction reveals significant myopic shift compared to last visit 12 months ago. Which is the most approp riate 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 - ANSWER -c/ Discuss findings with GP before prescribing Rx, The main c ause of amblyopia in a child: anisometropia >2, accommodative eso, intermittent exo - ANSWER -anisometropia >2, Which of the following can match Illuminant c: Incandescent, Halogen, Flourescent, sodium - ANSWER -Fluorescent 25 years old enquiring her suitability for laser refractive surgery. Which of the following is NOT essential pre -operatively: a/ Tonometry, b/ Tear film stability c/ pupil size, d/ Gonio - ANSWER -d/ Gonio 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 - 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? - ANSWER -improve lens hygeine
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