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. Just prior to the beginning of the TBUT test - the patient is instructed to...
ultrasound
blink
varies according to the type of test administered
narrow beam

2. A rose bengal does not require the use of...
the cobalt blue filter
0.3 mm
20
the use of an anesthetic

3. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery
a narrow angle and bowed iris cast a shadow on the iris
3.0 D

4. 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
reading disabilities
corneal endothelial drop-out
one-fourth

5. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
reading disabilities
blink
shine the light flatly from the side - in the plane of the iris
can often be cured if the causative factor is eliminated

6. When positioning the IOLMaster for the axial length reading...
both eyes equally
focus can he moved off-axis to obtain a clear reading
central corneal thickness
a narrow angle and bowed iris cast a shadow on the iris

7. Acquired color vision defects...
focus can he moved off-axis to obtain a clear reading
can often be cured if the causative factor is eliminated
reflex tears
Allow the patient to adjust to the light level before reading the letters.

8. 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
central corneal thickness
A Schirmer's test of 10 mm or more is considered normal.
severe dry eye

9. Before proceeding with the actual color plate test...
that the sound beam is directed to the optic disc and the measurement is incorrect
corneal endothelial drop-out
the patient is shown a sample that is discernable to normal and abnormal alike
suspected acquired color defect

10. This is not evaluated using rose Bengal except...
reading disabilities
more males than females
reflex tears
corneal endothelial drop-out

11. The Ishihara color plates are useful...
545 pm
for screening purposes - such as job applications
to have little or no shadow
severe dry eye

12. Measuring time for the Schirmer's test is...
that the sound beam is directed to the optic disc and the measurement is incorrect
23 to 24 mm
5 minutes
reading disabilities

13. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
ultrasound
patient wearing spectacles
varies according to the type of test
'test eye'

14. Laser interferometry uses which type of laser light?
infrared
holding the probe perpendicular to the corneal surface
differentiate between congenital or acquired color blindness
pressing on the globe too hard with the probe

15. The difference between Schirmer's test I and II is...
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots
the use of an anesthetic
a tall - central spike with only one peak and smaller spikes on either site

16. The ideal IOLMaster axial length graph is...
shortened axial length due to compression
posterior subcapsular cataract
a tall - central spike with only one peak and smaller spikes on either site
having them trace the number/figure

17. Illumination for the color plates test...
varies according to the type of test administered
central corneal thickness
the patient is shown a sample that is discernable to normal and abnormal alike
blink

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

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19. 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?
reading disabilities
A Schirmer's test of 10 mm or more is considered normal.
one-fourth
patient wearing spectacles

20. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
before starting school
remove the instrument from use
0.3 mm

21. Schirmer's test I is used to measure...
A Schirmer's test of 10 mm or more is considered normal.
reflex tears
the defect tends to remain stable over time
to have little or no shadow

22. Pachymetry readings are routinely taken prior to...
refractive surgery
tear filter papers
Allow the patient to adjust to the light level before reading the letters.
pressing on the globe too hard with the probe

23. Rose bengal is...
narrow beam
a staining agent
for screening purposes - such as job applications
differentiate between congenital or acquired color blindness

24. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
are based on the same general equation
narrow beam
the patient should be tested with near correction - if worn
white to white corneal diameter

25. Young children can be tested using the color plates by...
having them trace the number/figure
posterior subcapsular cataract
severe dry eye
IOL power

26. The axial length of an average adult eye is...
23 to 24 mm
remove the instrument from use
IOL power
refractive surgery

27. 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?
A-constant
the cobalt blue filter
0.3 mm
'test eye'

28. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
reflex tears
focus can he moved off-axis to obtain a clear reading
tear filter papers

29. When using a penlight to estimate anterior chamber depth - an open angle would appear...
2.0 or more
to have little or no shadow
the appearance of dry spots
desired postoperative refraction

30. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
severe dry eye
with the central cornea
a staining agent

31. Color vision defects in children are frequently detected among those with...
refractive error
reading disabilities
with the central cornea
can often be cured if the causative factor is eliminated

32. Color vision testing is used to detect all of the following except...
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness
narrow beam
20

33. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
the cobalt blue filter
A-constant
is acceptable

34. Almost all of the formulas for calculating IOL power...
infrared
desired postoperative refraction
dacryocystitis
are based on the same general equation

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

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36. When performing pachymetry prior to refractive surgery - it is generally best to begin...
normal tearing
blink
the appearance of dry spots
with the central cornea

37. Schirmer's test does not require _____ except Test strips
posterior subcapsular cataract
having them trace the number/figure
holding the probe perpendicular to the corneal surface
expensive equipment

38. Glare testing is used to identify...
A-constant
red-green
'test eye'
decrease in vision due to glare conditions

39. When should a child have his or her color vision checked?
patient wearing spectacles
severe dry eye
before starting school
5 minutes

40. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
red-green
is acceptable
IOL power
pressing on the globe too hard with the probe

41. 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...
the cobalt blue filter
that the sound beam is directed to the optic disc and the measurement is incorrect
to the left of the scleral and orbital echoes
the appearance of dry spots

42. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
pressing on the globe too hard with the probe
IOL power
expensive equipment
20

43. 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)...
0.3 mm
A-constant
blink
with the central cornea

44. When calculating IOL power - each of the following are necessary except...
before starting school
IOL power
white to white corneal diameter
545 pm

45. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
narrow beam
2 to 3 seconds
shine the light flatly from the side - in the plane of the iris

46. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
A Schirmer's test of 10 mm or more is considered normal.
dacryocystitis
reflex tears

47. Hereditary color vision defects usually affect...
can often be cured if the causative factor is eliminated
a tall - central spike with only one peak and smaller spikes on either site
a staining agent
both eyes equally

48. The photosensitive pigments of the eye are sensitive to...
narrow beam
shine the light flatly from the side - in the plane of the iris
red - green - and blue
the cobalt blue filter

49. The average central thickness of the human cornea is...
holding the probe perpendicular to the corneal surface
red - green - and blue
545 pm
pressing on the globe too hard with the probe

50. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
shortened axial length due to compression
corneal endothelial drop-out
normal tearing
patients who have had corneal refractive surgery