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. In test a patient with the color pseudoisochromatic plates...
3.0 D
with the central cornea
patients who have had corneal refractive surgery
the patient should be tested with near correction - if worn

2. When using a penlight to estimate anterior chamber depth - an open angle would appear...
focus can he moved off-axis to obtain a clear reading
patients who have had corneal refractive surgery
to have little or no shadow
reading disabilities

3. Measuring corneal thickness via nonoptical pachymetry involves the use of...
for screening purposes - such as job applications
blink
3.0 D
ultrasound

4. If a biometry instrument fails to calibrate properly - one should...
Allow the patient to adjust to the light level before reading the letters.
reflex tears
remove the instrument from use
a staining agent

5. The axial length of the eye is important in the calculation of...
rods
IOL power
having them trace the number/figure
before starting school

6. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
corneal endothelial drop-out
differentiate between congenital or acquired color blindness
the defect tends to remain stable over time
focus can he moved off-axis to obtain a clear reading

7. Pachymetry readings are routinely taken prior to...
2 to 3 seconds
holding the probe perpendicular to the corneal surface
desired postoperative refraction
refractive surgery

8. Schirmer's test does not require _____ except Test strips
refractive surgery
patient wearing spectacles
differentiate between congenital or acquired color blindness
expensive equipment

9. Color vision defects in children are frequently detected among those with...
to the left of the scleral and orbital echoes
2 to 3 seconds
reading disabilities
varies according to the type of test

10. The IOLMaster evaluates each of the following except...
infrared
refractive error
are based on the same general equation
reading disabilities

11. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
3.0 D
posterior subcapsular cataract
10 seconds

12. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
decrease in vision due to glare conditions
are based on the same general equation
the use of an anesthetic

13. Hereditary color defects most often fall into which category?
blink
to the left of the scleral and orbital echoes
red-green
to have little or no shadow

14. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
patient wearing spectacles
rods
blink

15. One of the keys in accurate pachymetry is...
10 seconds
holding the probe perpendicular to the corneal surface
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression

16. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
'test eye'
IOL power
545 pm

17. When should a child have his or her color vision checked?
tear filter papers
can often be cured if the causative factor is eliminated
before starting school
10 seconds

18. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
more males than females
reflex tears
A-constant

19. 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
10 seconds
white to white corneal diameter

20. With the 1OLMaster - the ideal signal-to-noise ratio is...
Allow the patient to adjust to the light level before reading the letters.
rods
the use of an anesthetic
2.0 or more

21. Which eye structure is responsible for color vision?
posterior subcapsular cataract
decrease in vision due to glare conditions
rods
Allow the patient to adjust to the light level before reading the letters.

22. 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?
0.3 mm
suspected acquired color defect
both eyes equally
narrow angles may precipitate an angle-closure glaucoma attack

23. A color plate that shows no obvious number to normal and abnormal alike is useful because...
both eyes equally
expensive equipment
a malingerer may invent a number - thus identifying him- or herself
narrow angles may precipitate an angle-closure glaucoma attack

24. When calculating IOL power - each of the following are necessary except...
patients who have had corneal refractive surgery
white to white corneal diameter
normal tearing
refractive error

25. In evaluating an axial length scan - the retinal echo must be...
A-constant
to the left of the scleral and orbital echoes
suspected acquired color defect
varies according to the type of test administered

26. When using color plates - a score indicates abnormal color vision...
5 minutes
varies according to the type of test
are based on the same general equation
reading disabilities

27. The difference between Schirmer's test I and II is...
a staining agent
23 to 24 mm
infrared
the use of an anesthetic

28. A rose bengal does not require the use of...
red - green - and blue
0.3 mm
the cobalt blue filter
reading disabilities

29. The type of pachymetry used to evaluate a glaucoma suspect is...
infrared
can often be cured if the causative factor is eliminated
'test eye'
central corneal thickness

30. Estimating the anterior chamber depth with a penlight works because...
5 minutes
dacryocystitis
a narrow angle and bowed iris cast a shadow on the iris
before starting school

31. Almost all of the formulas for calculating IOL power...
patient wearing spectacles
are based on the same general equation
'test eye'
is acceptable

32. Laser interferometry uses which type of laser light?
infrared
'test eye'
the use of an anesthetic
refractive surgery

33. Which of the following should be color-vision tested one eye at a time?
severe dry eye
is acceptable
ultrasound
suspected acquired color defect

34. Schirmer's test II is used to measure...
to have little or no shadow
normal tearing
white to white corneal diameter
one-fourth

35. The Schirmer's test might be indicated in all of the following except...
patients who have had corneal refractive surgery
blink
dacryocystitis
0.3 mm

36. Schirmer's test I is used to measure...
IOL power
refractive surgery
normal tearing
reflex tears

37. Rose bengal is...
red-green
reading disabilities
a narrow angle and bowed iris cast a shadow on the iris
a staining agent

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

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39. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
patients who have had corneal refractive surgery
focus can he moved off-axis to obtain a clear reading
more males than females

40. Hereditary color vision defects usually affect...
a tall - central spike with only one peak and smaller spikes on either site
blink
both eyes equally
red-green

41. The ideal IOLMaster axial length graph is...
545 pm
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site
normal tearing

42. Glare testing is used to identify...
patients who have had corneal refractive surgery
to have little or no shadow
decrease in vision due to glare conditions
a malingerer may invent a number - thus identifying him- or herself

43. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
one-fourth
10 seconds
IOL power
patient wearing spectacles

44. The IOLMaster eliminates which of the following sources of error?
decrease in vision due to glare conditions
shortened axial length due to compression
pressing on the globe too hard with the probe
23 to 24 mm

45. 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)...
that the sound beam is directed to the optic disc and the measurement is incorrect
A-constant
patient wearing spectacles
having them trace the number/figure

46. Just prior to the beginning of the TBUT test - the patient is instructed to...
20
desired postoperative refraction
the cobalt blue filter
blink

47. The axial length of an average adult eye is...
rods
are based on the same general equation
23 to 24 mm
desired postoperative refraction

48. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
red - green - and blue
20
one-fourth

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. Acquired color vision defects...
having them trace the number/figure
3.0 D
2.0 or more
can often be cured if the causative factor is eliminated