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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. It is important to estimate the anterior chamber depth prior to dilation because...
a staining agent
narrow angles may precipitate an angle-closure glaucoma attack
desired postoperative refraction
refractive surgery

2. When calculating IOL power - each of the following are necessary except...
central corneal thickness
white to white corneal diameter
a tall - central spike with only one peak and smaller spikes on either site
for screening purposes - such as job applications

3. In test a patient with the color pseudoisochromatic plates...
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
the patient should be tested with near correction - if worn
expensive equipment

4. When performing a brightness acuity glare test - it is best to do which of the following?
5 minutes
the patient is shown a sample that is discernable to normal and abnormal alike
shortened axial length due to compression
Allow the patient to adjust to the light level before reading the letters.

5. Laser interferometry uses which type of laser light?
remove the instrument from use
infrared
expensive equipment
blink

6. Acquired color vision defects...
a staining agent
545 pm
the cobalt blue filter
can often be cured if the causative factor is eliminated

7. When positioning the IOLMaster for the axial length reading...
refractive error
holding the probe perpendicular to the corneal surface
white to white corneal diameter
focus can he moved off-axis to obtain a clear reading

8. Hereditary color vision defects usually affect...
the use of an anesthetic
the patient should be tested with near correction - if worn
focus can he moved off-axis to obtain a clear reading
both eyes equally

9. A patient with which of the following potential diagnoses would be tested with bengal?
20
narrow angles may precipitate an angle-closure glaucoma attack
0.3 mm
severe dry eye

10. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
'test eye'
blink
focus can he moved off-axis to obtain a clear reading

11. Rose bengal is...
to have little or no shadow
varies according to the type of test
a staining agent
red-green

12. 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?
the cobalt blue filter
differentiate between congenital or acquired color blindness
one-fourth
suspected acquired color defect

13. Pachymetry readings are routinely taken prior to...
10 seconds
the use of an anesthetic
refractive surgery
the defect tends to remain stable over time

14. When performing pachymetry prior to refractive surgery - it is generally best to begin...
holding the probe perpendicular to the corneal surface
focus can he moved off-axis to obtain a clear reading
0.3 mm
with the central cornea

15. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
ultrasound
refractive error
patients who have had corneal refractive surgery

16. 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?
patient wearing spectacles
0.3 mm
is acceptable
pressing on the globe too hard with the probe

17. The IOLMaster evaluates each of the following except...
posterior subcapsular cataract
refractive error
2 to 3 seconds
the defect tends to remain stable over time

18. The Ishihara color plates are useful...
varies according to the type of test
reading disabilities
545 pm
for screening purposes - such as job applications

19. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
2.0 or more
patient wearing spectacles
545 pm
a narrow angle and bowed iris cast a shadow on the iris

20. The difference between Schirmer's test I and II is...
20
the use of an anesthetic
normal tearing
2.0 or more

21. Almost all of the formulas for calculating IOL power...
patients who have had corneal refractive surgery
are based on the same general equation
refractive error
decrease in vision due to glare conditions

22. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
the appearance of dry spots
the patient is shown a sample that is discernable to normal and abnormal alike
can often be cured if the causative factor is eliminated

23. When using a penlight to estimate anterior chamber depth - an open angle would appear...
reading disabilities
to have little or no shadow
545 pm
a tall - central spike with only one peak and smaller spikes on either site

24. Measuring corneal thickness via nonoptical pachymetry involves the use of...
patients who have had corneal refractive surgery
ultrasound
that the sound beam is directed to the optic disc and the measurement is incorrect
rods

25. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
20
3.0 D
2 to 3 seconds

26. An A-Sean can he artificially shortened due to...
to the left of the scleral and orbital echoes
pressing on the globe too hard with the probe
holding the probe perpendicular to the corneal surface
can often be cured if the causative factor is eliminated

27. A rose bengal does not require the use of...
ultrasound
infrared
the cobalt blue filter
varies according to the type of test administered

28. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
refractive error
'test eye'
posterior subcapsular cataract

29. Schirmer's test II is used to measure...
normal tearing
10 seconds
the patient is shown a sample that is discernable to normal and abnormal alike
A Schirmer's test of 10 mm or more is considered normal.

30. Color vision testing is used to detect all of the following except...
shine the light flatly from the side - in the plane of the iris
dacryocystitis
holding the probe perpendicular to the corneal surface
differentiate between congenital or acquired color blindness

31. When should a child have his or her color vision checked?
posterior subcapsular cataract
before starting school
'test eye'
a tall - central spike with only one peak and smaller spikes on either site

32. If a biometry instrument fails to calibrate properly - one should...
ultrasound
remove the instrument from use
normal tearing
Allow the patient to adjust to the light level before reading the letters.

33. Hereditary color defects most often fall into which category?
rods
infrared
is acceptable
red-green

34. Schirmer's test does not require _____ except Test strips
both eyes equally
remove the instrument from use
expensive equipment
red-green

35. How long should the patient be given to recognize the figure in a color plate?
the appearance of dry spots
0.3 mm
2 to 3 seconds
corneal endothelial drop-out

36. Which eye structure is responsible for color vision?
shine the light flatly from the side - in the plane of the iris
rods
varies according to the type of test administered
one-fourth

37. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
the use of an anesthetic
patients who have had corneal refractive surgery
before starting school

38. Before proceeding with the actual color plate test...
2 to 3 seconds
patient wearing spectacles
suspected acquired color defect
the patient is shown a sample that is discernable to normal and abnormal alike

39. Hereditary color vision defects affect...
decrease in vision due to glare conditions
the appearance of dry spots
more males than females
can often be cured if the causative factor is eliminated

40. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
white to white corneal diameter
shine the light flatly from the side - in the plane of the iris
shortened axial length due to compression
suspected acquired color defect

41. The IOLMaster eliminates which of the following sources of error?
that the sound beam is directed to the optic disc and the measurement is incorrect
shortened axial length due to compression
focus can he moved off-axis to obtain a clear reading
545 pm

42. The Schirmer's test might be indicated in all of the following except...
ultrasound
focus can he moved off-axis to obtain a clear reading
expensive equipment
dacryocystitis

43. The axial length of the eye is important in the calculation of...
the defect tends to remain stable over time
IOL power
2 to 3 seconds
patients who have had corneal refractive surgery

44. 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...
more males than females
ultrasound
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

45. Just prior to the beginning of the TBUT test - the patient is instructed to...
more males than females
having them trace the number/figure
shortened axial length due to compression
blink

46. Illumination for the color plates test...
red - green - and blue
a staining agent
the use of an anesthetic
varies according to the type of test administered

47. Measuring time for the Schirmer's test is...
the patient is shown a sample that is discernable to normal and abnormal alike
patients who have had corneal refractive surgery
2.0 or more
5 minutes

48. 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)...
both eyes equally
'test eye'
having them trace the number/figure
A-constant

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. A TBUT of which of the following would indicate tear film dysfunction?
red-green
the defect tends to remain stable over time
10 seconds
the appearance of dry spots