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 average central thickness of the human cornea is...






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






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






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






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






6. Illumination for the color plates test...






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






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






9. 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?






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






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






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






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






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






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






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






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






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

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






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






22. Hereditary color vision defects usually affect...






23. Acquired color vision defects...






24. The Ishihara color plates are useful...






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






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






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






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






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






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






31. 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)...






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






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






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






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






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






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






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






39. Hereditary color vision defects affect...






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






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






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






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






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






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






46. Rose bengal is...






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






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






49. Laser interferometry uses which type of laser light?






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