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. The axial length of the eye is important in the calculation of...






2. In an axial length A-scan - if there is only one tall echo from the back of the eye with no other echoes behind it - this indicates...






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






4. When positioning the IOLMaster for the axial length reading...






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






6. Hereditary color vision defects usually affect...






7. How long should the patient be given to recognize the figure in a color plate?






8. Rose bengal is...






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






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






11. Which eye structure is responsible for color vision?






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






13. The Schirmer's test might be indicated in all of the following except...






14. Color vision defects in children are frequently detected among those with...






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






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






17. 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?






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






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






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






21. Schirmer's test does not require _____ except Test strips






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






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






24. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...






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






26. In which of the following would glare testing be most appropriate?






27. Acquired color vision defects...






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






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

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30. 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)...






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






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






33. In evaluating an axial length scan - the retinal echo must be...






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






35. The Ishihara color plates are useful...






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






37. When using a penlight to estimate anterior chamber depth - an open angle would appear...






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






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






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






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






42. Each of the following can cause an error in the axial length scan reading of the IOL Master except...






43. Hereditary color vision defects affect...






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






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






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






47. Laser interferometry uses which type of laser light?






48. Glare testing is used to identify...






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






50. Pachymetry readings are routinely taken prior to...