Test your basic knowledge |

Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

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 should a child have his or her color vision checked?
A-constant
before starting school
a malingerer may invent a number - thus identifying him- or herself
reading disabilities

2. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
one-fourth
is acceptable
desired postoperative refraction
corneal endothelial drop-out

3. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
a narrow angle and bowed iris cast a shadow on the iris
545 pm
the cobalt blue filter

4. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
is acceptable
tear filter papers
holding the probe perpendicular to the corneal surface

5. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
2.0 or more
narrow beam
can often be cured if the causative factor is eliminated
shine the light flatly from the side - in the plane of the iris

6. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
narrow beam
20
the use of an anesthetic
that the sound beam is directed to the optic disc and the measurement is incorrect

7. This is not evaluated using rose Bengal except...
narrow beam
differentiate between congenital or acquired color blindness
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris

8. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
central corneal thickness
0.3 mm
A-constant
patients who have had corneal refractive surgery

9. Before proceeding with the actual color plate test...
suspected acquired color defect
3.0 D
the patient is shown a sample that is discernable to normal and abnormal alike
can often be cured if the causative factor is eliminated

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

11. Acquired color vision defects...
to the left of the scleral and orbital echoes
can often be cured if the causative factor is eliminated
varies according to the type of test administered
2.0 or more

12. Color vision testing is used to detect all of the following except...
23 to 24 mm
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself
patients who have had corneal refractive surgery

13. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
545 pm
patients who have had corneal refractive surgery
posterior subcapsular cataract

14. The type of pachymetry used to evaluate a glaucoma suspect is...
red - green - and blue
severe dry eye
central corneal thickness
patients who have had corneal refractive surgery

15. Illumination for the color plates test...
0.3 mm
varies according to the type of test administered
normal tearing
shortened axial length due to compression

16. A color plate that shows no obvious number to normal and abnormal alike is useful because...
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
0.3 mm
2.0 or more

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

18. Color vision defects in children are frequently detected among those with...
white to white corneal diameter
reading disabilities
blink
23 to 24 mm

19. It is important to estimate the anterior chamber depth prior to dilation because...
tear filter papers
narrow angles may precipitate an angle-closure glaucoma attack
5 minutes
patient wearing spectacles

20. Measuring time for the Schirmer's test is...
5 minutes
to have little or no shadow
one-fourth
A-constant

21. Estimating the anterior chamber depth with a penlight works because...
23 to 24 mm
with the central cornea
patient wearing spectacles
a narrow angle and bowed iris cast a shadow on the iris

22. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
red-green
dacryocystitis
3.0 D
is acceptable

23. Schirmer's test II is used to measure...
normal tearing
varies according to the type of test administered
posterior subcapsular cataract
holding the probe perpendicular to the corneal surface

24. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
5 minutes
expensive equipment
A Schirmer's test of 10 mm or more is considered normal.

25. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
5 minutes
refractive surgery
to the left of the scleral and orbital echoes

26. When performing a brightness acuity glare test - it is best to do which of the following?
decrease in vision due to glare conditions
refractive error
Allow the patient to adjust to the light level before reading the letters.
ultrasound

27. Glare testing is used to identify...
decrease in vision due to glare conditions
expensive equipment
corneal endothelial drop-out
one-fourth

28. A patient with which of the following potential diagnoses would be tested with bengal?
suspected acquired color defect
red-green
severe dry eye
5 minutes

29. Pachymetry readings are routinely taken prior to...
the defect tends to remain stable over time
shine the light flatly from the side - in the plane of the iris
545 pm
refractive surgery

30. When calculating intraocular lens (IOL) powers - one must enter...
patients who have had corneal refractive surgery
reflex tears
desired postoperative refraction
3.0 D

31. When positioning the IOLMaster for the axial length reading...
red-green
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
tear filter papers

32. 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...
a malingerer may invent a number - thus identifying him- or herself
the patient should be tested with near correction - if worn
that the sound beam is directed to the optic disc and the measurement is incorrect
a narrow angle and bowed iris cast a shadow on the iris

33. Hereditary color vision defects affect...
more males than females
before starting school
patient wearing spectacles
narrow angles may precipitate an angle-closure glaucoma attack

34. If a biometry instrument fails to calibrate properly - one should...
2.0 or more
a staining agent
remove the instrument from use
desired postoperative refraction

35. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
A-constant
the defect tends to remain stable over time
central corneal thickness
decrease in vision due to glare conditions

36. The difference between Schirmer's test I and II is...
the use of an anesthetic
A-constant
ultrasound
the defect tends to remain stable over time

37. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
varies according to the type of test administered
dacryocystitis
red - green - and blue

38. With the 1OLMaster - the ideal signal-to-noise ratio is...
narrow angles may precipitate an angle-closure glaucoma attack
rods
2.0 or more
for screening purposes - such as job applications

39. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
A Schirmer's test of 10 mm or more is considered normal.
that the sound beam is directed to the optic disc and the measurement is incorrect
desired postoperative refraction

40. Measuring corneal thickness via nonoptical pachymetry involves the use of...
patients who have had corneal refractive surgery
A Schirmer's test of 10 mm or more is considered normal.
ultrasound
Allow the patient to adjust to the light level before reading the letters.

41. The axial length of the eye is important in the calculation of...
IOL power
varies according to the type of test administered
tear filter papers
patient wearing spectacles

42. In which of the following would glare testing be most appropriate?
the defect tends to remain stable over time
posterior subcapsular cataract
a narrow angle and bowed iris cast a shadow on the iris
dacryocystitis

43. How long should the patient be given to recognize the figure in a color plate?
0.3 mm
having them trace the number/figure
expensive equipment
2 to 3 seconds

44. Almost all of the formulas for calculating IOL power...
for screening purposes - such as job applications
are based on the same general equation
red - green - and blue
dacryocystitis

45. Schirmer's test I is used to measure...
the defect tends to remain stable over time
reflex tears
more males than females
A-constant

46. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
patient wearing spectacles
2.0 or more
is acceptable

47. The ideal IOLMaster axial length graph is...
545 pm
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test
rods

48. Which eye structure is responsible for color vision?
rods
severe dry eye
the patient should be tested with near correction - if worn
tear filter papers

49. 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?
0.3 mm
suspected acquired color defect
holding the probe perpendicular to the corneal surface
23 to 24 mm

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?
is acceptable
posterior subcapsular cataract
23 to 24 mm
one-fourth