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. Schirmer's test II is used to measure...
shine the light flatly from the side - in the plane of the iris
2 to 3 seconds
normal tearing
'test eye'

2. Young children can be tested using the color plates by...
the defect tends to remain stable over time
for screening purposes - such as job applications
having them trace the number/figure
narrow angles may precipitate an angle-closure glaucoma attack

3. With the 1OLMaster - the ideal signal-to-noise ratio is...
A-constant
are based on the same general equation
shortened axial length due to compression
2.0 or more

4. The ideal IOLMaster axial length graph is...
varies according to the type of test administered
a tall - central spike with only one peak and smaller spikes on either site
the patient should be tested with near correction - if worn
the patient is shown a sample that is discernable to normal and abnormal alike

5. Illumination for the color plates test...
the defect tends to remain stable over time
dacryocystitis
3.0 D
varies according to the type of test administered

6. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
23 to 24 mm
reading disabilities
rods

7. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
suspected acquired color defect
both eyes equally
patient wearing spectacles
can often be cured if the causative factor is eliminated

8. A TBUT of which of the following would indicate tear film dysfunction?
tear filter papers
suspected acquired color defect
more males than females
10 seconds

9. A rose bengal does not require the use of...
patients who have had corneal refractive surgery
the cobalt blue filter
the patient is shown a sample that is discernable to normal and abnormal alike
before starting school

10. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
with the central cornea
10 seconds
23 to 24 mm

11. It is important to estimate the anterior chamber depth prior to dilation because...
can often be cured if the causative factor is eliminated
before starting school
narrow angles may precipitate an angle-closure glaucoma attack
the appearance of dry spots

12. How long should the patient be given to recognize the figure in a color plate?
white to white corneal diameter
2 to 3 seconds
ultrasound
the patient should be tested with near correction - if worn

13. The IOLMaster eliminates which of the following sources of error?
the patient is shown a sample that is discernable to normal and abnormal alike
A-constant
patients who have had corneal refractive surgery
shortened axial length due to compression

14. Just prior to the beginning of the TBUT test - the patient is instructed to...
can often be cured if the causative factor is eliminated
patient wearing spectacles
blink
severe dry eye

15. The Schirmer's test might be indicated in all of the following except...
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis
refractive error
holding the probe perpendicular to the corneal surface

16. One of the keys in accurate pachymetry is...
can often be cured if the causative factor is eliminated
corneal endothelial drop-out
are based on the same general equation
holding the probe perpendicular to the corneal surface

17. Before proceeding with the actual color plate test...
the use of an anesthetic
severe dry eye
the defect tends to remain stable over time
the patient is shown a sample that is discernable to normal and abnormal alike

18. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
central corneal thickness
narrow beam
a narrow angle and bowed iris cast a shadow on the iris

19. Estimating the anterior chamber depth with a penlight works because...
20
focus can he moved off-axis to obtain a clear reading
a narrow angle and bowed iris cast a shadow on the iris
2.0 or more

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

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21. In which of the following would glare testing be most appropriate?
the cobalt blue filter
10 seconds
dacryocystitis
posterior subcapsular cataract

22. The Ishihara color plates are useful...
23 to 24 mm
for screening purposes - such as job applications
Allow the patient to adjust to the light level before reading the letters.
3.0 D

23. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
5 minutes
rods
narrow beam
patient wearing spectacles

24. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
red-green
corneal endothelial drop-out
normal tearing

25. In test a patient with the color pseudoisochromatic plates...
10 seconds
the patient should be tested with near correction - if worn
with the central cornea
normal tearing

26. When using a penlight to estimate anterior chamber depth - an open angle would appear...
is acceptable
severe dry eye
both eyes equally
to have little or no shadow

27. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
to have little or no shadow
reflex tears
3.0 D
can often be cured if the causative factor is eliminated

28. When should a child have his or her color vision checked?
reflex tears
blink
IOL power
before starting school

29. The photosensitive pigments of the eye are sensitive to...
red-green
the use of an anesthetic
red - green - and blue
the cobalt blue filter

30. Hereditary color defects most often fall into which category?
decrease in vision due to glare conditions
holding the probe perpendicular to the corneal surface
red-green
20

31. Which eye structure is responsible for color vision?
are based on the same general equation
the defect tends to remain stable over time
rods
0.3 mm

32. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
infrared
a malingerer may invent a number - thus identifying him- or herself
remove the instrument from use

33. 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...
that the sound beam is directed to the optic disc and the measurement is incorrect
focus can he moved off-axis to obtain a clear reading
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself

34. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
for screening purposes - such as job applications
refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack

35. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
narrow angles may precipitate an angle-closure glaucoma attack
the patient is shown a sample that is discernable to normal and abnormal alike
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

36. Measuring time for the Schirmer's test is...
Allow the patient to adjust to the light level before reading the letters.
for screening purposes - such as job applications
infrared
5 minutes

37. This is not evaluated using rose Bengal except...
ultrasound
a narrow angle and bowed iris cast a shadow on the iris
20
corneal endothelial drop-out

38. 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?
central corneal thickness
0.3 mm
pressing on the globe too hard with the probe
decrease in vision due to glare conditions

39. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
differentiate between congenital or acquired color blindness
shine the light flatly from the side - in the plane of the iris

40. Almost all of the formulas for calculating IOL power...
to have little or no shadow
red-green
narrow beam
are based on the same general equation

41. Color vision defects in children are frequently detected among those with...
reading disabilities
the cobalt blue filter
2 to 3 seconds
before starting school

42. Laser interferometry uses which type of laser light?
having them trace the number/figure
reading disabilities
infrared
blink

43. 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)...
corneal endothelial drop-out
reading disabilities
before starting school
A-constant

44. When performing a brightness acuity glare test - it is best to do which of the following?
having them trace the number/figure
Allow the patient to adjust to the light level before reading the letters.
545 pm
0.3 mm

45. An A-Sean can he artificially shortened due to...
5 minutes
pressing on the globe too hard with the probe
posterior subcapsular cataract
reflex tears

46. Pachymetry readings are routinely taken prior to...
narrow angles may precipitate an angle-closure glaucoma attack
red-green
central corneal thickness
refractive surgery

47. When performing pachymetry prior to refractive surgery - it is generally best to begin...
varies according to the type of test
can often be cured if the causative factor is eliminated
with the central cornea
a tall - central spike with only one peak and smaller spikes on either site

48. The axial length of the eye is important in the calculation of...
a narrow angle and bowed iris cast a shadow on the iris
can often be cured if the causative factor is eliminated
IOL power
0.3 mm

49. The difference between Schirmer's test I and II is...
a malingerer may invent a number - thus identifying him- or herself
varies according to the type of test administered
for screening purposes - such as job applications
the use of an anesthetic

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

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