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






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






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






4. Glare testing is used to identify...






5. Which eye structure is responsible for color vision?






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






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






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






9. 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...






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






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






12. Hereditary color vision defects usually affect...






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






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






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






16. Illumination for the color plates test...






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






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






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






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






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






22. Acquired color vision defects...






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






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






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






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






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


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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






48. The Ishihara color plates are useful...






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






50. 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?