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






2. 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?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






18. Laser interferometry uses which type of laser light?






19. When should a child have his or her color vision checked?






20. 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)...






21. 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?






22. Illumination for the color plates test...






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






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






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






26. Acquired color vision defects...






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






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






29. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...






30. Hereditary color vision defects affect...






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






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






33. The axial length of an average adult eye is...






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






35. A TBUT of which of the following would indicate tear film dysfunction?






36. In test a patient with the color pseudoisochromatic plates...






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






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






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






40. Hereditary color vision defects usually affect...






41. Rose bengal is...






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






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






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






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






46. The Ishihara color plates are useful...






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






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






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






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