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. A color plate that shows no obvious number to normal and abnormal alike is useful because...
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test
severe dry eye
a malingerer may invent a number - thus identifying him- or herself

2. When calculating IOL power - each of the following are necessary except...
a tall - central spike with only one peak and smaller spikes on either site
refractive error
white to white corneal diameter
is acceptable

3. Illumination for the color plates test...
10 seconds
3.0 D
varies according to the type of test administered
with the central cornea

4. The difference between Schirmer's test I and II is...
the defect tends to remain stable over time
having them trace the number/figure
the use of an anesthetic
tear filter papers

5. A patient with which of the following potential diagnoses would be tested with bengal?
to have little or no shadow
patients who have had corneal refractive surgery
severe dry eye
more males than females

6. When performing a brightness acuity glare test - it is best to do which of the following?
the cobalt blue filter
Allow the patient to adjust to the light level before reading the letters.
before starting school
reflex tears

7. A TBUT of which of the following would indicate tear film dysfunction?
a staining agent
10 seconds
more males than females
white to white corneal diameter

8. Color vision defects in children are frequently detected among those with...
reading disabilities
A Schirmer's test of 10 mm or more is considered normal.
2.0 or more
having them trace the number/figure

9. Schirmer's test II is used to measure...
normal tearing
dacryocystitis
the use of an anesthetic
a narrow angle and bowed iris cast a shadow on the iris

10. Measuring corneal thickness via nonoptical pachymetry involves the use of...
545 pm
ultrasound
2.0 or more
white to white corneal diameter

11. The Ishihara color plates are useful...
suspected acquired color defect
for screening purposes - such as job applications
a narrow angle and bowed iris cast a shadow on the iris
the patient should be tested with near correction - if worn

12. Schirmer's test does not require _____ except Test strips
that the sound beam is directed to the optic disc and the measurement is incorrect
white to white corneal diameter
the patient should be tested with near correction - if worn
expensive equipment

13. Just prior to the beginning of the TBUT test - the patient is instructed to...
ultrasound
blink
2.0 or more
both eyes equally

14. The axial length of an average adult eye is...
23 to 24 mm
a tall - central spike with only one peak and smaller spikes on either site
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable

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

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16. The average central thickness of the human cornea is...
the cobalt blue filter
545 pm
a malingerer may invent a number - thus identifying him- or herself
with the central cornea

17. The Schirmer's test might be indicated in all of the following except...
narrow angles may precipitate an angle-closure glaucoma attack
remove the instrument from use
dacryocystitis
2.0 or more

18. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
central corneal thickness
rods
holding the probe perpendicular to the corneal surface

19. Rose bengal is...
to the left of the scleral and orbital echoes
normal tearing
a staining agent
dacryocystitis

20. In which of the following would glare testing be most appropriate?
reading disabilities
0.3 mm
posterior subcapsular cataract
ultrasound

21. The IOLMaster evaluates each of the following except...
refractive error
central corneal thickness
blink
IOL power

22. When using color plates - a score indicates abnormal color vision...
can often be cured if the causative factor is eliminated
varies according to the type of test
a narrow angle and bowed iris cast a shadow on the iris
patient wearing spectacles

23. 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)...
A-constant
holding the probe perpendicular to the corneal surface
one-fourth
blink

24. _______ are not used in evaluating tear break-up time (TBUT)
having them trace the number/figure
tear filter papers
one-fourth
20

25. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
a malingerer may invent a number - thus identifying him- or herself
corneal endothelial drop-out
narrow angles may precipitate an angle-closure glaucoma attack
the defect tends to remain stable over time

26. When calculating intraocular lens (IOL) powers - one must enter...
red - green - and blue
posterior subcapsular cataract
desired postoperative refraction
blink

27. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
A Schirmer's test of 10 mm or more is considered normal.
is acceptable
the patient is shown a sample that is discernable to normal and abnormal alike
pressing on the globe too hard with the probe

28. With the 1OLMaster - the ideal signal-to-noise ratio is...
one-fourth
2.0 or more
the patient is shown a sample that is discernable to normal and abnormal alike
a staining agent

29. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
before starting school
545 pm
differentiate between congenital or acquired color blindness

30. When should a child have his or her color vision checked?
3.0 D
before starting school
refractive error
the appearance of dry spots

31. 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?
for screening purposes - such as job applications
central corneal thickness
one-fourth
holding the probe perpendicular to the corneal surface

32. One of the keys in accurate pachymetry is...
desired postoperative refraction
refractive surgery
can often be cured if the causative factor is eliminated
holding the probe perpendicular to the corneal surface

33. The axial length of the eye is important in the calculation of...
tear filter papers
'test eye'
severe dry eye
IOL power

34. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test administered
central corneal thickness
for screening purposes - such as job applications

35. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
blink
normal tearing
tear filter papers

36. A rose bengal does not require the use of...
the cobalt blue filter
having them trace the number/figure
patients who have had corneal refractive surgery
to have little or no shadow

37. Measuring time for the Schirmer's test is...
decrease in vision due to glare conditions
5 minutes
tear filter papers
corneal endothelial drop-out

38. The photosensitive pigments of the eye are sensitive to...
2.0 or more
the use of an anesthetic
to have little or no shadow
red - green - and blue

39. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
central corneal thickness
tear filter papers
3.0 D
severe dry eye

40. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
shine the light flatly from the side - in the plane of the iris
posterior subcapsular cataract
the appearance of dry spots

41. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
the patient should be tested with near correction - if worn
for screening purposes - such as job applications
20

42. Hereditary color vision defects affect...
more males than females
white to white corneal diameter
the cobalt blue filter
a staining agent

43. Which eye structure is responsible for color vision?
rods
reading disabilities
3.0 D
dacryocystitis

44. 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
the patient should be tested with near correction - if worn
that the sound beam is directed to the optic disc and the measurement is incorrect
dacryocystitis

45. Schirmer's test I is used to measure...
reflex tears
the defect tends to remain stable over time
the patient is shown a sample that is discernable to normal and abnormal alike
narrow beam

46. In test a patient with the color pseudoisochromatic plates...
patient wearing spectacles
the patient should be tested with near correction - if worn
shine the light flatly from the side - in the plane of the iris
reflex tears

47. Hereditary color defects most often fall into which category?
normal tearing
shortened axial length due to compression
with the central cornea
red-green

48. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
is acceptable
narrow beam
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site

49. Hereditary color vision defects usually affect...
reflex tears
both eyes equally
narrow beam
for screening purposes - such as job applications

50. When performing the TBUT test - the observer is looking for...
with the central cornea
refractive surgery
decrease in vision due to glare conditions
the appearance of dry spots