Test your basic knowledge |

Certified Ophthalmic Assistant

Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In evaluating an axial length scan - the retinal echo must be...






2. Illumination for the color plates test...






3. Just prior to the beginning of the TBUT test - the patient is instructed to...






4. Almost all of the formulas for calculating IOL power...






5. One of the keys in accurate pachymetry is...






6. When calculating IOL power - each of the following are necessary except...






7. When using color plates - a score indicates abnormal color vision...






8. It is important to estimate the anterior chamber depth prior to dilation because...






9. This is not evaluated using rose Bengal except...






10. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...






11. When performing the TBUT test - the observer is looking for...






12. The photosensitive pigments of the eye are sensitive to...






13. The IOLMaster must be calibrated daily using a...

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14. The difference between Schirmer's test I and II is...






15. The ideal IOLMaster axial length graph is...






16. The Ishihara color plates are useful...






17. Which of the following poses problems in obtaining accurate measurements for IOL calculations?






18. Schirmer's test I is used to measure...






19. Acquired color vision defects...






20. Young children can be tested using the color plates by...






21. Which of the following should be color-vision tested one eye at a time?






22. When performing a brightness acuity glare test - it is best to do which of the following?






23. Hereditary color defects most often fall into which category?






24. Estimating the anterior chamber depth with a penlight works because...






25. A color plate that shows no obvious number to normal and abnormal alike is useful because...






26. A normally functioning lacrimal gland will produce by much wetting on a Schirmer's test strip after 5 minutes?

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27. In slit-lamp assessment of the corneal periphery - the dark interval should be a minimum of approximately how much of the total corneal width for the angle to he considered open and safe for dilation?






28. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...






29. With the 1OLMaster - the ideal signal-to-noise ratio is...






30. Measuring corneal thickness via nonoptical pachymetry involves the use of...






31. Which eye structure is responsible for color vision?






32. Measuring time for the Schirmer's test is...






33. The manufacturer of a given IOL often supplies a specific number that must be entered into the IOL calculations when the lens is to be used. This number is refer to as a(n)...






34. When performing pachymetry prior to refractive surgery - it is generally best to begin...






35. If a biometry instrument fails to calibrate properly - one should...






36. When calculating intraocular lens (IOL) powers - one must enter...






37. The average central thickness of the human cornea is...






38. Laser interferometry uses which type of laser light?






39. Color vision testing is used to detect all of the following except...






40. Hereditary color vision defects affect...






41. If the patient is suspected of having an acquired color vision defect - all of the following apply except...






42. A patient with which of the following potential diagnoses would be tested with bengal?






43. When comparing the axial lengths of a patient's left and right eye - how much of a difference between the eyes should signal you to repeat the measurement of both eyes?






44. The IOLMaster evaluates each of the following except...






45. Rose bengal is...






46. _______ are not used in evaluating tear break-up time (TBUT)






47. An A-Sean can he artificially shortened due to...






48. Before proceeding with the actual color plate test...






49. The IOLMaster eliminates which of the following sources of error?






50. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...







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