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






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






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






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






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






6. 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?






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






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

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






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






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






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






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






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






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






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






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






18. Rose bengal is...






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






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






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






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






23. 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)...






24. 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?






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






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






27. Hereditary color vision defects affect...






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






29. Which eye structure is responsible for color vision?






30. 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...






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






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






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






34. A rose bengal does not require the use of...






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






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






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






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






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






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






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






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






43. Hereditary color vision defects usually affect...






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






45. Laser interferometry uses which type of laser light?






46. Illumination for the color plates test...






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






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






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






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






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