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. Color vision testing is used to detect all of the following except...
to have little or no shadow
with the central cornea
differentiate between congenital or acquired color blindness
2 to 3 seconds

2. 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?
a malingerer may invent a number - thus identifying him- or herself
one-fourth
with the central cornea
shine the light flatly from the side - in the plane of the iris

3. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
for screening purposes - such as job applications
shine the light flatly from the side - in the plane of the iris
severe dry eye
A-constant

4. 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...
remove the instrument from use
the defect tends to remain stable over time
that the sound beam is directed to the optic disc and the measurement is incorrect
IOL power

5. Schirmer's test does not require _____ except Test strips
for screening purposes - such as job applications
expensive equipment
0.3 mm
that the sound beam is directed to the optic disc and the measurement is incorrect

6. Rose bengal is...
expensive equipment
decrease in vision due to glare conditions
more males than females
a staining agent

7. When performing the TBUT test - the observer is looking for...
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
patient wearing spectacles
the appearance of dry spots

8. Pachymetry readings are routinely taken prior to...
refractive surgery
IOL power
one-fourth
remove the instrument from use

9. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
the cobalt blue filter
that the sound beam is directed to the optic disc and the measurement is incorrect
refractive error

10. Hereditary color defects most often fall into which category?
normal tearing
red-green
holding the probe perpendicular to the corneal surface
more males than females

11. One of the keys in accurate pachymetry is...
545 pm
a staining agent
holding the probe perpendicular to the corneal surface
are based on the same general equation

12. When performing pachymetry prior to refractive surgery - it is generally best to begin...
dacryocystitis
with the central cornea
reading disabilities
Allow the patient to adjust to the light level before reading the letters.

13. Schirmer's test II is used to measure...
the defect tends to remain stable over time
normal tearing
rods
the appearance of dry spots

14. The ideal IOLMaster axial length graph is...
with the central cornea
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site
before starting school

15. The Ishihara color plates are useful...
the defect tends to remain stable over time
that the sound beam is directed to the optic disc and the measurement is incorrect
shine the light flatly from the side - in the plane of the iris
for screening purposes - such as job applications

16. Glare testing is used to identify...
decrease in vision due to glare conditions
tear filter papers
Allow the patient to adjust to the light level before reading the letters.
differentiate between congenital or acquired color blindness

17. When calculating intraocular lens (IOL) powers - one must enter...
varies according to the type of test administered
a staining agent
desired postoperative refraction
infrared

18. With the 1OLMaster - the ideal signal-to-noise ratio is...
reflex tears
to have little or no shadow
2.0 or more
the defect tends to remain stable over time

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

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20. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
a tall - central spike with only one peak and smaller spikes on either site
refractive error
are based on the same general equation

21. The average central thickness of the human cornea is...
IOL power
545 pm
one-fourth
that the sound beam is directed to the optic disc and the measurement is incorrect

22. The axial length of an average adult eye is...
suspected acquired color defect
holding the probe perpendicular to the corneal surface
23 to 24 mm
the patient is shown a sample that is discernable to normal and abnormal alike

23. A TBUT of which of the following would indicate tear film dysfunction?
having them trace the number/figure
corneal endothelial drop-out
10 seconds
patients who have had corneal refractive surgery

24. The type of pachymetry used to evaluate a glaucoma suspect is...
is acceptable
reflex tears
patients who have had corneal refractive surgery
central corneal thickness

25. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
expensive equipment
more males than females
patients who have had corneal refractive surgery
ultrasound

26. 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)...
ultrasound
the patient should be tested with near correction - if worn
A-constant
holding the probe perpendicular to the corneal surface

27. The Schirmer's test might be indicated in all of the following except...
a malingerer may invent a number - thus identifying him- or herself
a staining agent
dacryocystitis
Allow the patient to adjust to the light level before reading the letters.

28. The IOLMaster evaluates each of the following except...
ultrasound
reading disabilities
white to white corneal diameter
refractive error

29. When should a child have his or her color vision checked?
before starting school
a narrow angle and bowed iris cast a shadow on the iris
white to white corneal diameter
tear filter papers

30. When using a penlight to estimate anterior chamber depth - an open angle would appear...
blink
23 to 24 mm
to have little or no shadow
0.3 mm

31. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
pressing on the globe too hard with the probe
central corneal thickness
5 minutes

32. 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
infrared
differentiate between congenital or acquired color blindness
normal tearing

33. Which of the following should be color-vision tested one eye at a time?
0.3 mm
suspected acquired color defect
IOL power
a staining agent

34. If a biometry instrument fails to calibrate properly - one should...
the use of an anesthetic
red-green
having them trace the number/figure
remove the instrument from use

35. A rose bengal does not require the use of...
a malingerer may invent a number - thus identifying him- or herself
A Schirmer's test of 10 mm or more is considered normal.
the cobalt blue filter
desired postoperative refraction

36. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
10 seconds
suspected acquired color defect
refractive surgery

37. The IOLMaster eliminates which of the following sources of error?
normal tearing
one-fourth
shortened axial length due to compression
IOL power

38. Measuring corneal thickness via nonoptical pachymetry involves the use of...
white to white corneal diameter
holding the probe perpendicular to the corneal surface
ultrasound
2.0 or more

39. Measuring time for the Schirmer's test is...
focus can he moved off-axis to obtain a clear reading
10 seconds
central corneal thickness
5 minutes

40. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
before starting school
20
the patient is shown a sample that is discernable to normal and abnormal alike
the defect tends to remain stable over time

41. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself
a narrow angle and bowed iris cast a shadow on the iris

42. A patient with which of the following potential diagnoses would be tested with bengal?
red-green
patient wearing spectacles
are based on the same general equation
severe dry eye

43. The difference between Schirmer's test I and II is...
corneal endothelial drop-out
the use of an anesthetic
infrared
can often be cured if the causative factor is eliminated

44. When calculating IOL power - each of the following are necessary except...
23 to 24 mm
2.0 or more
white to white corneal diameter
before starting school

45. In evaluating an axial length scan - the retinal echo must be...
is acceptable
reading disabilities
posterior subcapsular cataract
to the left of the scleral and orbital echoes

46. This is not evaluated using rose Bengal except...
refractive error
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris
decrease in vision due to glare conditions

47. The photosensitive pigments of the eye are sensitive to...
desired postoperative refraction
before starting school
for screening purposes - such as job applications
red - green - and blue

48. An A-Sean can he artificially shortened due to...
is acceptable
pressing on the globe too hard with the probe
one-fourth
0.3 mm

49. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
IOL power
is acceptable
the use of an anesthetic
the defect tends to remain stable over time

50. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
corneal endothelial drop-out
0.3 mm
545 pm