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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. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
to the left of the scleral and orbital echoes
rods
patients who have had corneal refractive surgery
20

2. Hereditary color vision defects affect...
23 to 24 mm
the cobalt blue filter
the use of an anesthetic
more males than females

3. A rose bengal does not require the use of...
for screening purposes - such as job applications
normal tearing
focus can he moved off-axis to obtain a clear reading
the cobalt blue filter

4. Schirmer's test I is used to measure...
reflex tears
holding the probe perpendicular to the corneal surface
one-fourth
10 seconds

5. Young children can be tested using the color plates by...
shortened axial length due to compression
having them trace the number/figure
refractive surgery
desired postoperative refraction

6. Laser interferometry uses which type of laser light?
0.3 mm
to the left of the scleral and orbital echoes
infrared
patient wearing spectacles

7. The IOLMaster evaluates each of the following except...
normal tearing
refractive surgery
refractive error
red - green - and blue

8. When calculating intraocular lens (IOL) powers - one must enter...
red - green - and blue
desired postoperative refraction
a malingerer may invent a number - thus identifying him- or herself
red-green

9. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
the appearance of dry spots
is acceptable
a staining agent

10. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
2 to 3 seconds
IOL power
pressing on the globe too hard with the probe

11. Almost all of the formulas for calculating IOL power...
remove the instrument from use
the use of an anesthetic
a malingerer may invent a number - thus identifying him- or herself
are based on the same general equation

12. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
545 pm
the patient is shown a sample that is discernable to normal and abnormal alike
white to white corneal diameter

13. 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?
refractive surgery
10 seconds
the use of an anesthetic
0.3 mm

14. Pachymetry readings are routinely taken prior to...
varies according to the type of test
refractive surgery
Allow the patient to adjust to the light level before reading the letters.
desired postoperative refraction

15. The type of pachymetry used to evaluate a glaucoma suspect is...
posterior subcapsular cataract
the use of an anesthetic
central corneal thickness
the cobalt blue filter

16. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
with the central cornea
white to white corneal diameter
differentiate between congenital or acquired color blindness

17. The axial length of the eye is important in the calculation of...
0.3 mm
pressing on the globe too hard with the probe
IOL power
a malingerer may invent a number - thus identifying him- or herself

18. Color vision defects in children are frequently detected among those with...
refractive error
2.0 or more
A-constant
reading disabilities

19. Rose bengal is...
reading disabilities
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression
a staining agent

20. 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?
'test eye'
decrease in vision due to glare conditions
2 to 3 seconds
one-fourth

21. When performing a brightness acuity glare test - it is best to do which of the following?
having them trace the number/figure
differentiate between congenital or acquired color blindness
the patient is shown a sample that is discernable to normal and abnormal alike
Allow the patient to adjust to the light level before reading the letters.

22. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
patients who have had corneal refractive surgery
is acceptable
3.0 D
for screening purposes - such as job applications

23. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
is acceptable
are based on the same general equation
A-constant

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

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25. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow angles may precipitate an angle-closure glaucoma attack
'test eye'
reflex tears
narrow beam

26. 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
red-green
narrow angles may precipitate an angle-closure glaucoma attack
'test eye'

27. An A-Sean can he artificially shortened due to...
both eyes equally
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test

28. Illumination for the color plates test...
shortened axial length due to compression
can often be cured if the causative factor is eliminated
white to white corneal diameter
varies according to the type of test administered

29. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
desired postoperative refraction
both eyes equally
A-constant

30. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
reading disabilities
3.0 D
narrow beam

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
more males than females
Allow the patient to adjust to the light level before reading the letters.
A-constant

32. When calculating IOL power - each of the following are necessary except...
narrow angles may precipitate an angle-closure glaucoma attack
ultrasound
white to white corneal diameter
545 pm

33. Just prior to the beginning of the TBUT test - the patient is instructed to...
the defect tends to remain stable over time
'test eye'
blink
to have little or no shadow

34. The IOLMaster eliminates which of the following sources of error?
posterior subcapsular cataract
a staining agent
one-fourth
shortened axial length due to compression

35. A patient with which of the following potential diagnoses would be tested with bengal?
red - green - and blue
rods
severe dry eye
to the left of the scleral and orbital echoes

36. In test a patient with the color pseudoisochromatic plates...
patients who have had corneal refractive surgery
narrow beam
before starting school
the patient should be tested with near correction - if worn

37. This is not evaluated using rose Bengal except...
the use of an anesthetic
corneal endothelial drop-out
3.0 D
reflex tears

38. Hereditary color vision defects usually affect...
both eyes equally
the patient is shown a sample that is discernable to normal and abnormal alike
is acceptable
desired postoperative refraction

39. The difference between Schirmer's test I and II is...
narrow beam
with the central cornea
10 seconds
the use of an anesthetic

40. When should a child have his or her color vision checked?
before starting school
both eyes equally
refractive error
the cobalt blue filter

41. Which eye structure is responsible for color vision?
severe dry eye
rods
having them trace the number/figure
the patient should be tested with near correction - if worn

42. If a biometry instrument fails to calibrate properly - one should...
patient wearing spectacles
the patient is shown a sample that is discernable to normal and abnormal alike
remove the instrument from use
reflex tears

43. Hereditary color defects most often fall into which category?
infrared
with the central cornea
10 seconds
red-green

44. Measuring time for the Schirmer's test is...
one-fourth
that the sound beam is directed to the optic disc and the measurement is incorrect
remove the instrument from use
5 minutes

45. A TBUT of which of the following would indicate tear film dysfunction?
patient wearing spectacles
10 seconds
5 minutes
for screening purposes - such as job applications

46. Color vision testing is used to detect all of the following except...
with the central cornea
white to white corneal diameter
a malingerer may invent a number - thus identifying him- or herself
differentiate between congenital or acquired color blindness

47. _______ are not used in evaluating tear break-up time (TBUT)
is acceptable
suspected acquired color defect
10 seconds
tear filter papers

48. The Ishihara color plates are useful...
'test eye'
a narrow angle and bowed iris cast a shadow on the iris
one-fourth
for screening purposes - such as job applications

49. 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
reading disabilities
0.3 mm
refractive surgery

50. Schirmer's test II is used to measure...
normal tearing
20
the appearance of dry spots
a malingerer may invent a number - thus identifying him- or herself