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. Which eye structure is responsible for color vision?
for screening purposes - such as job applications
red - green - and blue
rods
to the left of the scleral and orbital echoes

2. The IOLMaster evaluates each of the following except...
the patient should be tested with near correction - if worn
refractive error
the use of an anesthetic
focus can he moved off-axis to obtain a clear reading

3. Just prior to the beginning of the TBUT test - the patient is instructed to...
red-green
dacryocystitis
blink
can often be cured if the causative factor is eliminated

4. The difference between Schirmer's test I and II is...
posterior subcapsular cataract
refractive surgery
the use of an anesthetic
A-constant

5. Color vision testing is used to detect all of the following except...
the cobalt blue filter
differentiate between congenital or acquired color blindness
the patient is shown a sample that is discernable to normal and abnormal alike
reflex tears

6. Almost all of the formulas for calculating IOL power...
the patient is shown a sample that is discernable to normal and abnormal alike
are based on the same general equation
can often be cured if the causative factor is eliminated
shortened axial length due to compression

7. Hereditary color defects most often fall into which category?
a narrow angle and bowed iris cast a shadow on the iris
the patient should be tested with near correction - if worn
Allow the patient to adjust to the light level before reading the letters.
red-green

8. Young children can be tested using the color plates by...
3.0 D
having them trace the number/figure
suspected acquired color defect
narrow beam

9. The average central thickness of the human cornea is...
narrow angles may precipitate an angle-closure glaucoma attack
more males than females
545 pm
the patient should be tested with near correction - if worn

10. When should a child have his or her color vision checked?
shortened axial length due to compression
before starting school
refractive surgery
red-green

11. Illumination for the color plates test...
varies according to the type of test administered
red - green - and blue
with the central cornea
narrow angles may precipitate an angle-closure glaucoma attack

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)...
refractive surgery
A-constant
blink
normal tearing

13. The photosensitive pigments of the eye are sensitive to...
the appearance of dry spots
blink
2 to 3 seconds
red - green - and blue

14. In which of the following would glare testing be most appropriate?
2 to 3 seconds
pressing on the globe too hard with the probe
can often be cured if the causative factor is eliminated
posterior subcapsular cataract

15. Estimating the anterior chamber depth with a penlight works because...
holding the probe perpendicular to the corneal surface
0.3 mm
a narrow angle and bowed iris cast a shadow on the iris
to the left of the scleral and orbital echoes

16. Rose bengal is...
shine the light flatly from the side - in the plane of the iris
545 pm
tear filter papers
a staining agent

17. How long should the patient be given to recognize the figure in a color plate?
patients who have had corneal refractive surgery
the appearance of dry spots
2 to 3 seconds
infrared

18. One of the keys in accurate pachymetry is...
a tall - central spike with only one peak and smaller spikes on either site
with the central cornea
before starting school
holding the probe perpendicular to the corneal surface

19. A rose bengal does not require the use of...
a tall - central spike with only one peak and smaller spikes on either site
desired postoperative refraction
A Schirmer's test of 10 mm or more is considered normal.
the cobalt blue filter

20. Pachymetry readings are routinely taken prior to...
refractive surgery
with the central cornea
normal tearing
23 to 24 mm

21. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
focus can he moved off-axis to obtain a clear reading
varies according to the type of test administered
is acceptable

22. In evaluating an axial length scan - the retinal echo must be...
3.0 D
tear filter papers
severe dry eye
to the left of the scleral and orbital echoes

23. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shortened axial length due to compression
23 to 24 mm
can often be cured if the causative factor is eliminated
shine the light flatly from the side - in the plane of the iris

24. Schirmer's test II is used to measure...
both eyes equally
3.0 D
suspected acquired color defect
normal tearing

25. A color plate that shows no obvious number to normal and abnormal alike is useful because...
shortened axial length due to compression
a malingerer may invent a number - thus identifying him- or herself
3.0 D
tear filter papers

26. Measuring time for the Schirmer's test is...
a staining agent
5 minutes
normal tearing
to the left of the scleral and orbital echoes

27. Glare testing is used to identify...
'test eye'
decrease in vision due to glare conditions
having them trace the number/figure
pressing on the globe too hard with the probe

28. Hereditary color vision defects usually affect...
patients who have had corneal refractive surgery
red-green
'test eye'
both eyes equally

29. When calculating intraocular lens (IOL) powers - one must enter...
reading disabilities
normal tearing
desired postoperative refraction
IOL power

30. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
3.0 D
the patient is shown a sample that is discernable to normal and abnormal alike
23 to 24 mm
having them trace the number/figure

31. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
can often be cured if the causative factor is eliminated
5 minutes
narrow beam

32. Schirmer's test I is used to measure...
reflex tears
545 pm
3.0 D
2.0 or more

33. The IOLMaster eliminates which of the following sources of error?
red - green - and blue
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
shortened axial length due to compression

34. When positioning the IOLMaster for the axial length reading...
varies according to the type of test
focus can he moved off-axis to obtain a clear reading
20
shine the light flatly from the side - in the plane of the iris

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

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36. 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...
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
varies according to the type of test

37. The axial length of an average adult eye is...
holding the probe perpendicular to the corneal surface
is acceptable
23 to 24 mm
pressing on the globe too hard with the probe

38. Acquired color vision defects...
shortened axial length due to compression
patients who have had corneal refractive surgery
the use of an anesthetic
can often be cured if the causative factor is eliminated

39. The Schirmer's test might be indicated in all of the following except...
severe dry eye
to have little or no shadow
varies according to the type of test administered
dacryocystitis

40. The Ishihara color plates are useful...
focus can he moved off-axis to obtain a clear reading
before starting school
for screening purposes - such as job applications
IOL power

41. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
red - green - and blue
20
shine the light flatly from the side - in the plane of the iris
corneal endothelial drop-out

42. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
ultrasound
red - green - and blue
0.3 mm

43. If a biometry instrument fails to calibrate properly - one should...
refractive error
remove the instrument from use
narrow beam
normal tearing

44. Color vision defects in children are frequently detected among those with...
reading disabilities
the cobalt blue filter
both eyes equally
5 minutes

45. An A-Sean can he artificially shortened due to...
545 pm
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site
IOL power

46. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
the patient should be tested with near correction - if worn
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike

47. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
'test eye'
corneal endothelial drop-out
2 to 3 seconds

48. Laser interferometry uses which type of laser light?
rods
having them trace the number/figure
infrared
can often be cured if the causative factor is eliminated

49. With the 1OLMaster - the ideal signal-to-noise ratio is...
expensive equipment
to have little or no shadow
2.0 or more
'test eye'

50. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
3.0 D
20
is acceptable
corneal endothelial drop-out