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. Illumination for the color plates test...
both eyes equally
shortened axial length due to compression
remove the instrument from use
varies according to the type of test administered

2. Schirmer's test does not require _____ except Test strips
pressing on the globe too hard with the probe
tear filter papers
expensive equipment
to have little or no shadow

3. The type of pachymetry used to evaluate a glaucoma suspect is...
the cobalt blue filter
ultrasound
patients who have had corneal refractive surgery
central corneal thickness

4. When using a penlight to estimate anterior chamber depth - an open angle would appear...
expensive equipment
are based on the same general equation
reflex tears
to have little or no shadow

5. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
blink
one-fourth
20
central corneal thickness

6. It is important to estimate the anterior chamber depth prior to dilation because...
patients who have had corneal refractive surgery
red-green
infrared
narrow angles may precipitate an angle-closure glaucoma attack

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

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8. Schirmer's test I is used to measure...
reflex tears
2.0 or more
suspected acquired color defect
to the left of the scleral and orbital echoes

9. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
A Schirmer's test of 10 mm or more is considered normal.
remove the instrument from use
narrow beam

10. When performing a brightness acuity glare test - it is best to do which of the following?
shine the light flatly from the side - in the plane of the iris
Allow the patient to adjust to the light level before reading the letters.
a tall - central spike with only one peak and smaller spikes on either site
focus can he moved off-axis to obtain a clear reading

11. The Schirmer's test might be indicated in all of the following except...
IOL power
with the central cornea
dacryocystitis
more males than females

12. When performing the TBUT test - the observer is looking for...
to the left of the scleral and orbital echoes
dacryocystitis
the appearance of dry spots
shine the light flatly from the side - in the plane of the iris

13. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
dacryocystitis
posterior subcapsular cataract
shine the light flatly from the side - in the plane of the iris
red-green

14. One of the keys in accurate pachymetry is...
rods
normal tearing
holding the probe perpendicular to the corneal surface
before starting school

15. When using color plates - a score indicates abnormal color vision...
central corneal thickness
white to white corneal diameter
varies according to the type of test
0.3 mm

16. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
remove the instrument from use
shortened axial length due to compression
having them trace the number/figure

17. When should a child have his or her color vision checked?
refractive surgery
'test eye'
before starting school
the cobalt blue filter

18. A rose bengal does not require the use of...
the cobalt blue filter
to the left of the scleral and orbital echoes
more males than females
narrow beam

19. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
a narrow angle and bowed iris cast a shadow on the iris
narrow angles may precipitate an angle-closure glaucoma attack
one-fourth

20. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
holding the probe perpendicular to the corneal surface
23 to 24 mm
a staining agent

21. 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?
focus can he moved off-axis to obtain a clear reading
Allow the patient to adjust to the light level before reading the letters.
reading disabilities
one-fourth

22. A color plate that shows no obvious number to normal and abnormal alike is useful because...
reflex tears
dacryocystitis
a malingerer may invent a number - thus identifying him- or herself
the patient is shown a sample that is discernable to normal and abnormal alike

23. _______ are not used in evaluating tear break-up time (TBUT)
IOL power
that the sound beam is directed to the optic disc and the measurement is incorrect
tear filter papers
red - green - and blue

24. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
expensive equipment
narrow beam
varies according to the type of test

25. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
reflex tears
corneal endothelial drop-out
narrow beam
the cobalt blue filter

26. Which eye structure is responsible for color vision?
the patient is shown a sample that is discernable to normal and abnormal alike
refractive error
rods
ultrasound

27. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
reading disabilities
3.0 D
shine the light flatly from the side - in the plane of the iris

28. Rose bengal is...
focus can he moved off-axis to obtain a clear reading
central corneal thickness
a staining agent
before starting school

29. Just prior to the beginning of the TBUT test - the patient is instructed to...
a tall - central spike with only one peak and smaller spikes on either site
blink
the appearance of dry spots
is acceptable

30. Hereditary color defects most often fall into which category?
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test
corneal endothelial drop-out
red-green

31. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
varies according to the type of test administered
reading disabilities
'test eye'

32. Hereditary color vision defects usually affect...
red-green
IOL power
both eyes equally
pressing on the globe too hard with the probe

33. 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?
holding the probe perpendicular to the corneal surface
0.3 mm
the defect tends to remain stable over time
the use of an anesthetic

34. When performing pachymetry prior to refractive surgery - it is generally best to begin...
IOL power
with the central cornea
the appearance of dry spots
dacryocystitis

35. Color vision defects in children are frequently detected among those with...
to the left of the scleral and orbital echoes
reading disabilities
infrared
for screening purposes - such as job applications

36. The average central thickness of the human cornea is...
2.0 or more
holding the probe perpendicular to the corneal surface
2 to 3 seconds
545 pm

37. When calculating intraocular lens (IOL) powers - one must enter...
2 to 3 seconds
to have little or no shadow
20
desired postoperative refraction

38. Hereditary color vision defects affect...
more males than females
the cobalt blue filter
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack

39. In test a patient with the color pseudoisochromatic plates...
reading disabilities
A Schirmer's test of 10 mm or more is considered normal.
the patient should be tested with near correction - if worn
a narrow angle and bowed iris cast a shadow on the iris

40. A TBUT of which of the following would indicate tear film dysfunction?
shine the light flatly from the side - in the plane of the iris
10 seconds
to the left of the scleral and orbital echoes
shortened axial length due to compression

41. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
a malingerer may invent a number - thus identifying him- or herself
to have little or no shadow
desired postoperative refraction

42. When positioning the IOLMaster for the axial length reading...
severe dry eye
red-green
focus can he moved off-axis to obtain a clear reading
remove the instrument from use

43. If a biometry instrument fails to calibrate properly - one should...
corneal endothelial drop-out
10 seconds
focus can he moved off-axis to obtain a clear reading
remove the instrument from use

44. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
are based on the same general equation
red - green - and blue
red-green

45. When calculating IOL power - each of the following are necessary except...
20
545 pm
white to white corneal diameter
'test eye'

46. Which of the following should be color-vision tested one eye at a time?
blink
the appearance of dry spots
suspected acquired color defect
patient wearing spectacles

47. Schirmer's test II is used to measure...
narrow angles may precipitate an angle-closure glaucoma attack
the defect tends to remain stable over time
focus can he moved off-axis to obtain a clear reading
normal tearing

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

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49. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
narrow angles may precipitate an angle-closure glaucoma attack
A Schirmer's test of 10 mm or more is considered normal.
dacryocystitis
patients who have had corneal refractive surgery

50. 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...
a narrow angle and bowed iris cast a shadow on the iris
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
10 seconds