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 rose bengal does not require the use of...
before starting school
the cobalt blue filter
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
shine the light flatly from the side - in the plane of the iris
refractive surgery
545 pm
patients who have had corneal refractive surgery

3. The axial length of an average adult eye is...
to the left of the scleral and orbital echoes
20
23 to 24 mm
0.3 mm

4. In which of the following would glare testing be most appropriate?
dacryocystitis
one-fourth
refractive error
posterior subcapsular cataract

5. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
with the central cornea
varies according to the type of test
is acceptable
corneal endothelial drop-out

6. Which eye structure is responsible for color vision?
0.3 mm
both eyes equally
rods
corneal endothelial drop-out

7. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
one-fourth
3.0 D
having them trace the number/figure
remove the instrument from use

8. 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
that the sound beam is directed to the optic disc and the measurement is incorrect
'test eye'
normal tearing

9. When calculating intraocular lens (IOL) powers - one must enter...
is acceptable
the defect tends to remain stable over time
a narrow angle and bowed iris cast a shadow on the iris
desired postoperative refraction

10. Pachymetry readings are routinely taken prior to...
the appearance of dry spots
the patient is shown a sample that is discernable to normal and abnormal alike
refractive surgery
dacryocystitis

11. Young children can be tested using the color plates by...
the defect tends to remain stable over time
IOL power
3.0 D
having them trace the number/figure

12. Illumination for the color plates test...
varies according to the type of test administered
shortened axial length due to compression
corneal endothelial drop-out
2 to 3 seconds

13. Hereditary color vision defects affect...
holding the probe perpendicular to the corneal surface
more males than females
the patient should be tested with near correction - if worn
20

14. The difference between Schirmer's test I and II is...
A Schirmer's test of 10 mm or more is considered normal.
more males than females
one-fourth
the use of an anesthetic

15. Color vision testing is used to detect all of the following except...
tear filter papers
differentiate between congenital or acquired color blindness
one-fourth
is acceptable

16. In evaluating an axial length scan - the retinal echo must be...
is acceptable
before starting school
to the left of the scleral and orbital echoes
both eyes equally

17. Schirmer's test I is used to measure...
3.0 D
narrow angles may precipitate an angle-closure glaucoma attack
reflex tears
IOL power

18. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
shortened axial length due to compression
2 to 3 seconds
pressing on the globe too hard with the probe

19. A patient with which of the following potential diagnoses would be tested with bengal?
20
central corneal thickness
the use of an anesthetic
severe dry eye

20. Acquired color vision defects...
can often be cured if the causative factor is eliminated
a tall - central spike with only one peak and smaller spikes on either site
2.0 or more
the use of an anesthetic

21. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
0.3 mm
narrow beam
dacryocystitis
to have little or no shadow

22. Which of the following should be color-vision tested one eye at a time?
having them trace the number/figure
suspected acquired color defect
red-green
focus can he moved off-axis to obtain a clear reading

23. When positioning the IOLMaster for the axial length reading...
the appearance of dry spots
more males than females
focus can he moved off-axis to obtain a clear reading
A-constant

24. When using a penlight to estimate anterior chamber depth - an open angle would appear...
the defect tends to remain stable over time
a tall - central spike with only one peak and smaller spikes on either site
to have little or no shadow
suspected acquired color defect

25. Hereditary color defects most often fall into which category?
red-green
patients who have had corneal refractive surgery
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

26. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
the patient should be tested with near correction - if worn
A Schirmer's test of 10 mm or more is considered normal.
one-fourth

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

28. The IOLMaster eliminates which of the following sources of error?
red-green
both eyes equally
central corneal thickness
shortened axial length due to compression

29. One of the keys in accurate pachymetry is...
red - green - and blue
refractive error
dacryocystitis
holding the probe perpendicular to the corneal surface

30. When calculating IOL power - each of the following are necessary except...
holding the probe perpendicular to the corneal surface
rods
white to white corneal diameter
A-constant

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
blink
a tall - central spike with only one peak and smaller spikes on either site
with the central cornea
2.0 or more

32. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
focus can he moved off-axis to obtain a clear reading
'test eye'
narrow angles may precipitate an angle-closure glaucoma attack

33. The Ishihara color plates are useful...
IOL power
0.3 mm
for screening purposes - such as job applications
refractive surgery

34. A color plate that shows no obvious number to normal and abnormal alike is useful because...
2.0 or more
shortened axial length due to compression
rods
a malingerer may invent a number - thus identifying him- or herself

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

36. The IOLMaster evaluates each of the following except...
patients who have had corneal refractive surgery
IOL power
refractive error
infrared

37. When performing the TBUT test - the observer is looking for...
desired postoperative refraction
the appearance of dry spots
reading disabilities
20

38. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
3.0 D
shine the light flatly from the side - in the plane of the iris
the defect tends to remain stable over time
suspected acquired color defect

39. Measuring time for the Schirmer's test is...
is acceptable
refractive error
ultrasound
5 minutes

40. Rose bengal is...
to have little or no shadow
a staining agent
the defect tends to remain stable over time
white to white corneal diameter

41. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
for screening purposes - such as job applications
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading

42. Laser interferometry uses which type of laser light?
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site
the use of an anesthetic
infrared

43. 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...
blink
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
focus can he moved off-axis to obtain a clear reading

44. 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)...
to have little or no shadow
A-constant
tear filter papers
2 to 3 seconds

45. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
patients who have had corneal refractive surgery
focus can he moved off-axis to obtain a clear reading
differentiate between congenital or acquired color blindness

46. Schirmer's test does not require _____ except Test strips
reading disabilities
expensive equipment
normal tearing
ultrasound

47. Schirmer's test II is used to measure...
dacryocystitis
refractive error
patients who have had corneal refractive surgery
normal tearing

48. When should a child have his or her color vision checked?
before starting school
A Schirmer's test of 10 mm or more is considered normal.
normal tearing
having them trace the number/figure

49. Measuring corneal thickness via nonoptical pachymetry involves the use of...
2 to 3 seconds
are based on the same general equation
ultrasound
patients who have had corneal refractive surgery

50. _______ are not used in evaluating tear break-up time (TBUT)
'test eye'
shine the light flatly from the side - in the plane of the iris
are based on the same general equation
tear filter papers