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. A patient with which of the following potential diagnoses would be tested with bengal?
A-constant
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
severe dry eye

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the patient should be tested with near correction - if worn
narrow beam
patients who have had corneal refractive surgery
pressing on the globe too hard with the probe

3. When performing a brightness acuity glare test - it is best to do which of the following?
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
posterior subcapsular cataract
the patient should be tested with near correction - if worn

4. Pachymetry readings are routinely taken prior to...
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test
refractive surgery
shine the light flatly from the side - in the plane of the iris

5. Which of the following should be color-vision tested one eye at a time?
decrease in vision due to glare conditions
can often be cured if the causative factor is eliminated
suspected acquired color defect
both eyes equally

6. Illumination for the color plates test...
varies according to the type of test administered
Allow the patient to adjust to the light level before reading the letters.
to the left of the scleral and orbital echoes
varies according to the type of test

7. 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?
3.0 D
A-constant
red - green - and blue
0.3 mm

8. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a malingerer may invent a number - thus identifying him- or herself
to have little or no shadow
0.3 mm
20

9. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
dacryocystitis
white to white corneal diameter
20
5 minutes

10. The Ishihara color plates are useful...
23 to 24 mm
normal tearing
for screening purposes - such as job applications
varies according to the type of test

11. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
3.0 D
a staining agent
patient wearing spectacles

12. When positioning the IOLMaster for the axial length reading...
before starting school
10 seconds
focus can he moved off-axis to obtain a clear reading
dacryocystitis

13. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
for screening purposes - such as job applications
central corneal thickness
3.0 D

14. In which of the following would glare testing be most appropriate?
the patient is shown a sample that is discernable to normal and abnormal alike
posterior subcapsular cataract
are based on the same general equation
IOL power

15. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
2 to 3 seconds
blink
dacryocystitis
narrow beam

16. Schirmer's test II is used to measure...
the cobalt blue filter
both eyes equally
patients who have had corneal refractive surgery
normal tearing

17. With the 1OLMaster - the ideal signal-to-noise ratio is...
pressing on the globe too hard with the probe
the use of an anesthetic
one-fourth
2.0 or more

18. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
the cobalt blue filter
2.0 or more
refractive error
is acceptable

19. The Schirmer's test might be indicated in all of the following except...
holding the probe perpendicular to the corneal surface
A-constant
pressing on the globe too hard with the probe
dacryocystitis

20. Measuring corneal thickness via nonoptical pachymetry involves the use of...
dacryocystitis
a tall - central spike with only one peak and smaller spikes on either site
ultrasound
20

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

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22. Rose bengal is...
5 minutes
tear filter papers
a staining agent
more males than females

23. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
is acceptable
5 minutes
rods

24. The axial length of the eye is important in the calculation of...
IOL power
shortened axial length due to compression
rods
pressing on the globe too hard with the probe

25. The ideal IOLMaster axial length graph is...
blink
IOL power
a tall - central spike with only one peak and smaller spikes on either site
2.0 or more

26. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
the patient should be tested with near correction - if worn
ultrasound
shine the light flatly from the side - in the plane of the iris
a tall - central spike with only one peak and smaller spikes on either site

27. When using color plates - a score indicates abnormal color vision...
a narrow angle and bowed iris cast a shadow on the iris
varies according to the type of test
IOL power
more males than females

28. Hereditary color defects most often fall into which category?
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself
are based on the same general equation
red-green

29. Just prior to the beginning of the TBUT test - the patient is instructed to...
pressing on the globe too hard with the probe
blink
central corneal thickness
red - green - and blue

30. Almost all of the formulas for calculating IOL power...
'test eye'
are based on the same general equation
0.3 mm
a tall - central spike with only one peak and smaller spikes on either site

31. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
shortened axial length due to compression
23 to 24 mm
20

32. It is important to estimate the anterior chamber depth prior to dilation because...
reflex tears
shortened axial length due to compression
a staining agent
narrow angles may precipitate an angle-closure glaucoma attack

33. The type of pachymetry used to evaluate a glaucoma suspect is...
having them trace the number/figure
central corneal thickness
corneal endothelial drop-out
more males than females

34. 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)...
A-constant
normal tearing
varies according to the type of test
a staining agent

35. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
red-green
that the sound beam is directed to the optic disc and the measurement is incorrect
reflex tears

36. Measuring time for the Schirmer's test is...
tear filter papers
red-green
refractive error
5 minutes

37. Color vision defects in children are frequently detected among those with...
reading disabilities
545 pm
having them trace the number/figure
the patient should be tested with near correction - if worn

38. The average central thickness of the human cornea is...
focus can he moved off-axis to obtain a clear reading
545 pm
red - green - and blue
both eyes equally

39. Laser interferometry uses which type of laser light?
remove the instrument from use
differentiate between congenital or acquired color blindness
a tall - central spike with only one peak and smaller spikes on either site
infrared

40. Which eye structure is responsible for color vision?
that the sound beam is directed to the optic disc and the measurement is incorrect
rods
one-fourth
narrow beam

41. 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...
with the central cornea
focus can he moved off-axis to obtain a clear reading
that the sound beam is directed to the optic disc and the measurement is incorrect
a tall - central spike with only one peak and smaller spikes on either site

42. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
A-constant
545 pm
the patient should be tested with near correction - if worn
patient wearing spectacles

43. Schirmer's test I is used to measure...
red - green - and blue
expensive equipment
reflex tears
is acceptable

44. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
central corneal thickness
A-constant
a staining agent

45. Acquired color vision defects...
dacryocystitis
severe dry eye
can often be cured if the causative factor is eliminated
red-green

46. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
is acceptable
severe dry eye
'test eye'

47. How long should the patient be given to recognize the figure in a color plate?
the cobalt blue filter
2 to 3 seconds
shortened axial length due to compression
desired postoperative refraction

48. Before proceeding with the actual color plate test...
both eyes equally
varies according to the type of test
the patient is shown a sample that is discernable to normal and abnormal alike
to have little or no shadow

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

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50. When calculating IOL power - each of the following are necessary except...
2.0 or more
white to white corneal diameter
before starting school
narrow beam