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






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






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






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






5. 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?






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






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






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






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






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






11. Which of the following should be color-vision tested one eye at a time?






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






13. 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)...






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






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






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






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






18. 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...






19. 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?






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






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






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






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






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






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






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






27. The Ishihara color plates are useful...






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






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






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






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






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






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






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






35. Illumination for the color plates test...






36. Which eye structure is responsible for color vision?






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






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






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






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






41. Laser interferometry uses which type of laser light?






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






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






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






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






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






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






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






49. Acquired color vision defects...






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