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






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






3. Hereditary color vision defects affect...






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






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






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






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






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






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






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






11. Glare testing is used to identify...






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






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






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






15. Illumination for the color plates test...






16. 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...






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






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






19. 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?






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


21. 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)...






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






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






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






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






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






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






28. Which eye structure is responsible for color vision?






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






30. Rose bengal is...






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






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






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






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






35. The Ishihara color plates are useful...






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


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






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






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






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






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






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






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






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






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






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






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






48. Hereditary color vision defects usually affect...






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






50. Schirmer's test II is used to measure...