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. When performing a brightness acuity glare test - it is best to do which of the following?
to have little or no shadow
Allow the patient to adjust to the light level before reading the letters.
narrow angles may precipitate an angle-closure glaucoma attack
3.0 D

2. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
shine the light flatly from the side - in the plane of the iris
narrow beam
the defect tends to remain stable over time
a malingerer may invent a number - thus identifying him- or herself

3. Illumination for the color plates test...
the patient is shown a sample that is discernable to normal and abnormal alike
the appearance of dry spots
varies according to the type of test administered
to the left of the scleral and orbital echoes

4. The Ishihara color plates are useful...
545 pm
is acceptable
reading disabilities
for screening purposes - such as job applications

5. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye
remove the instrument from use
3.0 D

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

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7. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
to the left of the scleral and orbital echoes
A-constant
patients who have had corneal refractive surgery

8. A rose bengal does not require the use of...
the cobalt blue filter
0.3 mm
reading disabilities
is acceptable

9. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
are based on the same general equation
0.3 mm
reading disabilities

10. A patient with which of the following potential diagnoses would be tested with bengal?
the defect tends to remain stable over time
that the sound beam is directed to the optic disc and the measurement is incorrect
severe dry eye
with the central cornea

11. Laser interferometry uses which type of laser light?
are based on the same general equation
0.3 mm
infrared
a malingerer may invent a number - thus identifying him- or herself

12. 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)...
white to white corneal diameter
is acceptable
0.3 mm
A-constant

13. Pachymetry readings are routinely taken prior to...
refractive surgery
IOL power
pressing on the globe too hard with the probe
the patient should be tested with near correction - if worn

14. In evaluating an axial length scan - the retinal echo must be...
3.0 D
to the left of the scleral and orbital echoes
patients who have had corneal refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack

15. The average central thickness of the human cornea is...
red-green
expensive equipment
IOL power
545 pm

16. Rose bengal is...
a malingerer may invent a number - thus identifying him- or herself
545 pm
a staining agent
corneal endothelial drop-out

17. The difference between Schirmer's test I and II is...
focus can he moved off-axis to obtain a clear reading
one-fourth
the use of an anesthetic
545 pm

18. Schirmer's test I is used to measure...
shortened axial length due to compression
reflex tears
shine the light flatly from the side - in the plane of the iris
expensive equipment

19. Young children can be tested using the color plates by...
normal tearing
20
a tall - central spike with only one peak and smaller spikes on either site
having them trace the number/figure

20. The ideal IOLMaster axial length graph is...
are based on the same general equation
a tall - central spike with only one peak and smaller spikes on either site
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn

21. The IOLMaster evaluates each of the following except...
refractive error
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect
narrow beam

22. Almost all of the formulas for calculating IOL power...
suspected acquired color defect
more males than females
one-fourth
are based on the same general equation

23. The type of pachymetry used to evaluate a glaucoma suspect is...
a tall - central spike with only one peak and smaller spikes on either site
3.0 D
central corneal thickness
to have little or no shadow

24. Just prior to the beginning of the TBUT test - the patient is instructed to...
shine the light flatly from the side - in the plane of the iris
reading disabilities
blink
before starting school

25. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
a malingerer may invent a number - thus identifying him- or herself
'test eye'
shine the light flatly from the side - in the plane of the iris

26. It is important to estimate the anterior chamber depth prior to dilation because...
blink
remove the instrument from use
central corneal thickness
narrow angles may precipitate an angle-closure glaucoma attack

27. If a biometry instrument fails to calibrate properly - one should...
20
narrow angles may precipitate an angle-closure glaucoma attack
that the sound beam is directed to the optic disc and the measurement is incorrect
remove the instrument from use

28. 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...
'test eye'
white to white corneal diameter
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test administered

29. Before proceeding with the actual color plate test...
refractive error
the patient is shown a sample that is discernable to normal and abnormal alike
normal tearing
Allow the patient to adjust to the light level before reading the letters.

30. 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
2 to 3 seconds
to have little or no shadow
infrared

31. Schirmer's test does not require _____ except Test strips
that the sound beam is directed to the optic disc and the measurement is incorrect
expensive equipment
patient wearing spectacles
2 to 3 seconds

32. When calculating IOL power - each of the following are necessary except...
both eyes equally
white to white corneal diameter
varies according to the type of test
red - green - and blue

33. The IOLMaster eliminates which of the following sources of error?
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression
'test eye'
that the sound beam is directed to the optic disc and the measurement is incorrect

34. A color plate that shows no obvious number to normal and abnormal alike is useful because...
narrow beam
5 minutes
a malingerer may invent a number - thus identifying him- or herself
that the sound beam is directed to the optic disc and the measurement is incorrect

35. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
corneal endothelial drop-out
a malingerer may invent a number - thus identifying him- or herself
Allow the patient to adjust to the light level before reading the letters.

36. Schirmer's test II is used to measure...
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing
Allow the patient to adjust to the light level before reading the letters.
10 seconds

37. In which of the following would glare testing be most appropriate?
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
posterior subcapsular cataract
a narrow angle and bowed iris cast a shadow on the iris

38. The axial length of an average adult eye is...
blink
10 seconds
patients who have had corneal refractive surgery
23 to 24 mm

39. Hereditary color vision defects usually affect...
the patient should be tested with near correction - if worn
both eyes equally
are based on the same general equation
central corneal thickness

40. When positioning the IOLMaster for the axial length reading...
varies according to the type of test
patient wearing spectacles
focus can he moved off-axis to obtain a clear reading
ultrasound

41. The axial length of the eye is important in the calculation of...
the appearance of dry spots
IOL power
corneal endothelial drop-out
the patient should be tested with near correction - if worn

42. Acquired color vision defects...
for screening purposes - such as job applications
before starting school
can often be cured if the causative factor is eliminated
the use of an anesthetic

43. Measuring time for the Schirmer's test is...
Allow the patient to adjust to the light level before reading the letters.
with the central cornea
5 minutes
the patient should be tested with near correction - if worn

44. Color vision testing is used to detect all of the following except...
Allow the patient to adjust to the light level before reading the letters.
central corneal thickness
having them trace the number/figure
differentiate between congenital or acquired color blindness

45. The photosensitive pigments of the eye are sensitive to...
is acceptable
tear filter papers
a narrow angle and bowed iris cast a shadow on the iris
red - green - and blue

46. With the 1OLMaster - the ideal signal-to-noise ratio is...
shine the light flatly from the side - in the plane of the iris
for screening purposes - such as job applications
2.0 or more
refractive surgery

47. When performing the TBUT test - the observer is looking for...
23 to 24 mm
more males than females
reflex tears
the appearance of dry spots

48. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
one-fourth
patient wearing spectacles
blink
to have little or no shadow

49. Which of the following should be color-vision tested one eye at a time?
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn
white to white corneal diameter
suspected acquired color defect

50. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
reading disabilities
refractive surgery
23 to 24 mm