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. If a biometry instrument fails to calibrate properly - one should...
the patient should be tested with near correction - if worn
the use of an anesthetic
remove the instrument from use
both eyes equally

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
A Schirmer's test of 10 mm or more is considered normal.
the patient should be tested with near correction - if worn
patients who have had corneal refractive surgery
infrared

3. It is important to estimate the anterior chamber depth prior to dilation because...
blink
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
A Schirmer's test of 10 mm or more is considered normal.

4. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
IOL power
decrease in vision due to glare conditions
rods

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

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6. When performing pachymetry prior to refractive surgery - it is generally best to begin...
before starting school
with the central cornea
having them trace the number/figure
'test eye'

7. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
that the sound beam is directed to the optic disc and the measurement is incorrect
10 seconds
differentiate between congenital or acquired color blindness

8. Schirmer's test II is used to measure...
a tall - central spike with only one peak and smaller spikes on either site
can often be cured if the causative factor is eliminated
having them trace the number/figure
normal tearing

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

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10. Acquired color vision defects...
before starting school
a staining agent
can often be cured if the causative factor is eliminated
the cobalt blue filter

11. Hereditary color defects most often fall into which category?
holding the probe perpendicular to the corneal surface
red-green
0.3 mm
tear filter papers

12. The ideal IOLMaster axial length graph is...
severe dry eye
tear filter papers
that the sound beam is directed to the optic disc and the measurement is incorrect
a tall - central spike with only one peak and smaller spikes on either site

13. The average central thickness of the human cornea is...
varies according to the type of test administered
545 pm
a malingerer may invent a number - thus identifying him- or herself
2.0 or more

14. Young children can be tested using the color plates by...
a narrow angle and bowed iris cast a shadow on the iris
both eyes equally
having them trace the number/figure
545 pm

15. How long should the patient be given to recognize the figure in a color plate?
reading disabilities
to have little or no shadow
2 to 3 seconds
differentiate between congenital or acquired color blindness

16. 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?
narrow angles may precipitate an angle-closure glaucoma attack
one-fourth
varies according to the type of test
to the left of the scleral and orbital echoes

17. The difference between Schirmer's test I and II is...
'test eye'
the use of an anesthetic
3.0 D
dacryocystitis

18. 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
central corneal thickness
2 to 3 seconds
shortened axial length due to compression

19. When should a child have his or her color vision checked?
before starting school
a malingerer may invent a number - thus identifying him- or herself
the patient should be tested with near correction - if worn
shine the light flatly from the side - in the plane of the iris

20. A patient with which of the following potential diagnoses would be tested with bengal?
Allow the patient to adjust to the light level before reading the letters.
holding the probe perpendicular to the corneal surface
severe dry eye
suspected acquired color defect

21. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
remove the instrument from use
the cobalt blue filter
reflex tears

22. The type of pachymetry used to evaluate a glaucoma suspect is...
before starting school
pressing on the globe too hard with the probe
central corneal thickness
ultrasound

23. A color plate that shows no obvious number to normal and abnormal alike is useful because...
patient wearing spectacles
a malingerer may invent a number - thus identifying him- or herself
severe dry eye
the patient should be tested with near correction - if worn

24. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
to have little or no shadow
20
2 to 3 seconds
0.3 mm

25. When performing a brightness acuity glare test - it is best to do which of the following?
Allow the patient to adjust to the light level before reading the letters.
3.0 D
20
patient wearing spectacles

26. When using color plates - a score indicates abnormal color vision...
decrease in vision due to glare conditions
varies according to the type of test
red - green - and blue
both eyes equally

27. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
to have little or no shadow
dacryocystitis
varies according to the type of test

28. The IOLMaster evaluates each of the following except...
refractive error
patient wearing spectacles
corneal endothelial drop-out
more males than females

29. Schirmer's test I is used to measure...
shortened axial length due to compression
reflex tears
3.0 D
desired postoperative refraction

30. A rose bengal does not require the use of...
before starting school
A Schirmer's test of 10 mm or more is considered normal.
the cobalt blue filter
545 pm

31. In evaluating an axial length scan - the retinal echo must be...
refractive error
varies according to the type of test
to the left of the scleral and orbital echoes
the appearance of dry spots

32. Color vision testing is used to detect all of the following except...
narrow beam
differentiate between congenital or acquired color blindness
shortened axial length due to compression
both eyes equally

33. The Ishihara color plates are useful...
focus can he moved off-axis to obtain a clear reading
blink
for screening purposes - such as job applications
both eyes equally

34. Laser interferometry uses which type of laser light?
'test eye'
narrow beam
infrared
central corneal thickness

35. Glare testing is used to identify...
decrease in vision due to glare conditions
A Schirmer's test of 10 mm or more is considered normal.
can often be cured if the causative factor is eliminated
545 pm

36. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
normal tearing
the use of an anesthetic
patient wearing spectacles
the patient should be tested with near correction - if worn

37. Measuring time for the Schirmer's test is...
a staining agent
5 minutes
a tall - central spike with only one peak and smaller spikes on either site
20

38. When calculating IOL power - each of the following are necessary except...
holding the probe perpendicular to the corneal surface
'test eye'
white to white corneal diameter
varies according to the type of test

39. 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?
narrow beam
0.3 mm
shine the light flatly from the side - in the plane of the iris
one-fourth

40. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
a narrow angle and bowed iris cast a shadow on the iris
can often be cured if the causative factor is eliminated

41. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
23 to 24 mm
expensive equipment
3.0 D
that the sound beam is directed to the optic disc and the measurement is incorrect

42. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
central corneal thickness
posterior subcapsular cataract
a malingerer may invent a number - thus identifying him- or herself
the defect tends to remain stable over time

43. The Schirmer's test might be indicated in all of the following except...
0.3 mm
dacryocystitis
10 seconds
narrow beam

44. _______ are not used in evaluating tear break-up time (TBUT)
rods
tear filter papers
severe dry eye
refractive surgery

45. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
the patient should be tested with near correction - if worn
differentiate between congenital or acquired color blindness
having them trace the number/figure

46. Color vision defects in children are frequently detected among those with...
reading disabilities
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots

47. Pachymetry readings are routinely taken prior to...
'test eye'
the defect tends to remain stable over time
refractive surgery
10 seconds

48. 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...
to have little or no shadow
that the sound beam is directed to the optic disc and the measurement is incorrect
blink
10 seconds

49. The axial length of the eye is important in the calculation of...
the patient should be tested with near correction - if worn
545 pm
IOL power
expensive equipment

50. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
corneal endothelial drop-out
reading disabilities
differentiate between congenital or acquired color blindness