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. Hereditary color defects most often fall into which category?






2. The Ishihara color plates are useful...






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






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






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






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






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






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






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






10. 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...






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






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






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






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






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






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






17. Hereditary color vision defects affect...






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






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






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






21. Hereditary color vision defects usually affect...






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






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






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






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






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






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






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






29. Which eye structure is responsible for color vision?






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






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






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






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






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






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






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


37. Rose bengal is...






38. The type of pachymetry used to evaluate a glaucoma suspect is...






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






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


41. Illumination for the color plates test...






42. 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)...






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






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






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






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






47. Laser interferometry uses which type of laser light?






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






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






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