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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. When using color plates - a score indicates abnormal color vision...
shine the light flatly from the side - in the plane of the iris
having them trace the number/figure
varies according to the type of test
holding the probe perpendicular to the corneal surface

2. It is important to estimate the anterior chamber depth prior to dilation because...
refractive error
both eyes equally
a tall - central spike with only one peak and smaller spikes on either site
narrow angles may precipitate an angle-closure glaucoma attack

3. The IOLMaster eliminates which of the following sources of error?
both eyes equally
tear filter papers
are based on the same general equation
shortened axial length due to compression

4. Young children can be tested using the color plates by...
holding the probe perpendicular to the corneal surface
having them trace the number/figure
can often be cured if the causative factor is eliminated
varies according to the type of test

5. This is not evaluated using rose Bengal except...
reflex tears
the cobalt blue filter
refractive error
corneal endothelial drop-out

6. A TBUT of which of the following would indicate tear film dysfunction?
blink
10 seconds
differentiate between congenital or acquired color blindness
23 to 24 mm

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

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8. _______ are not used in evaluating tear break-up time (TBUT)
the patient should be tested with near correction - if worn
tear filter papers
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery

9. Color vision testing is used to detect all of the following except...
2 to 3 seconds
the patient is shown a sample that is discernable to normal and abnormal alike
differentiate between congenital or acquired color blindness
patients who have had corneal refractive surgery

10. 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
2.0 or more
dacryocystitis
that the sound beam is directed to the optic disc and the measurement is incorrect

11. Measuring time for the Schirmer's test is...
varies according to the type of test administered
Allow the patient to adjust to the light level before reading the letters.
the cobalt blue filter
5 minutes

12. 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?
varies according to the type of test administered
0.3 mm
central corneal thickness
are based on the same general equation

13. A color plate that shows no obvious number to normal and abnormal alike is useful because...
blink
a malingerer may invent a number - thus identifying him- or herself
remove the instrument from use
23 to 24 mm

14. When calculating intraocular lens (IOL) powers - one must enter...
the cobalt blue filter
2 to 3 seconds
before starting school
desired postoperative refraction

15. The ideal IOLMaster axial length graph is...
the use of an anesthetic
narrow beam
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site

16. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
3.0 D
the use of an anesthetic
refractive surgery
2.0 or more

17. Just prior to the beginning of the TBUT test - the patient is instructed to...
patients who have had corneal refractive surgery
reflex tears
narrow beam
blink

18. 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
expensive equipment
dacryocystitis
20

19. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
infrared
corneal endothelial drop-out
remove the instrument from use
the defect tends to remain stable over time

20. A rose bengal does not require the use of...
2.0 or more
the cobalt blue filter
white to white corneal diameter
differentiate between congenital or acquired color blindness

21. Which of the following should be color-vision tested one eye at a time?
white to white corneal diameter
with the central cornea
suspected acquired color defect
is acceptable

22. The photosensitive pigments of the eye are sensitive to...
545 pm
red - green - and blue
red-green
before starting school

23. The axial length of the eye is important in the calculation of...
normal tearing
is acceptable
IOL power
patient wearing spectacles

24. When positioning the IOLMaster for the axial length reading...
A Schirmer's test of 10 mm or more is considered normal.
focus can he moved off-axis to obtain a clear reading
expensive equipment
patient wearing spectacles

25. In evaluating an axial length scan - the retinal echo must be...
desired postoperative refraction
IOL power
corneal endothelial drop-out
to the left of the scleral and orbital echoes

26. Rose bengal is...
white to white corneal diameter
red-green
corneal endothelial drop-out
a staining agent

27. Pachymetry readings are routinely taken prior to...
infrared
refractive surgery
normal tearing
suspected acquired color defect

28. Glare testing is used to identify...
decrease in vision due to glare conditions
red - green - and blue
for screening purposes - such as job applications
with the central cornea

29. 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?
one-fourth
narrow beam
focus can he moved off-axis to obtain a clear reading
the cobalt blue filter

30. The axial length of an average adult eye is...
a tall - central spike with only one peak and smaller spikes on either site
Allow the patient to adjust to the light level before reading the letters.
23 to 24 mm
2.0 or more

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
blink
desired postoperative refraction
with the central cornea
the appearance of dry spots

32. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
red-green
20
posterior subcapsular cataract
dacryocystitis

33. Which eye structure is responsible for color vision?
3.0 D
patients who have had corneal refractive surgery
rods
narrow beam

34. The IOLMaster evaluates each of the following except...
refractive error
red - green - and blue
refractive surgery
IOL power

35. When should a child have his or her color vision checked?
patients who have had corneal refractive surgery
before starting school
decrease in vision due to glare conditions
0.3 mm

36. If a biometry instrument fails to calibrate properly - one should...
dacryocystitis
varies according to the type of test administered
ultrasound
remove the instrument from use

37. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
tear filter papers
is acceptable
refractive error
a staining agent

38. Schirmer's test I is used to measure...
reflex tears
2.0 or more
patients who have had corneal refractive surgery
0.3 mm

39. Measuring corneal thickness via nonoptical pachymetry involves the use of...
varies according to the type of test
desired postoperative refraction
shine the light flatly from the side - in the plane of the iris
ultrasound

40. Color vision defects in children are frequently detected among those with...
expensive equipment
reading disabilities
23 to 24 mm
the patient should be tested with near correction - if worn

41. The average central thickness of the human cornea is...
dacryocystitis
differentiate between congenital or acquired color blindness
545 pm
for screening purposes - such as job applications

42. Laser interferometry uses which type of laser light?
refractive surgery
3.0 D
varies according to the type of test administered
infrared

43. The Ishihara color plates are useful...
2 to 3 seconds
central corneal thickness
for screening purposes - such as job applications
corneal endothelial drop-out

44. Hereditary color vision defects usually affect...
white to white corneal diameter
patients who have had corneal refractive surgery
both eyes equally
10 seconds

45. A patient with which of the following potential diagnoses would be tested with bengal?
a narrow angle and bowed iris cast a shadow on the iris
a staining agent
reflex tears
severe dry eye

46. When calculating IOL power - each of the following are necessary except...
corneal endothelial drop-out
white to white corneal diameter
dacryocystitis
red - green - and blue

47. 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...
patient wearing spectacles
remove the instrument from use
the appearance of dry spots
that the sound beam is directed to the optic disc and the measurement is incorrect

48. Acquired color vision defects...
rods
that the sound beam is directed to the optic disc and the measurement is incorrect
refractive surgery
can often be cured if the causative factor is eliminated

49. When performing a brightness acuity glare test - it is best to do which of the following?
desired postoperative refraction
A-constant
to the left of the scleral and orbital echoes
Allow the patient to adjust to the light level before reading the letters.

50. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
shine the light flatly from the side - in the plane of the iris
reflex tears
to the left of the scleral and orbital echoes
patient wearing spectacles

Can you answer 50 questions in 15 minutes?

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Certified Ophthalmic Assistant

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