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. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
545 pm
rods
holding the probe perpendicular to the corneal surface

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

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3. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
a malingerer may invent a number - thus identifying him- or herself
patients who have had corneal refractive surgery
central corneal thickness

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...
pressing on the globe too hard with the probe
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
10 seconds

5. _______ are not used in evaluating tear break-up time (TBUT)
Allow the patient to adjust to the light level before reading the letters.
both eyes equally
patients who have had corneal refractive surgery
tear filter papers

6. Hereditary color vision defects usually affect...
3.0 D
20
reflex tears
both eyes equally

7. Color vision defects in children are frequently detected among those with...
focus can he moved off-axis to obtain a clear reading
20
reading disabilities
white to white corneal diameter

8. Young children can be tested using the color plates by...
A-constant
dacryocystitis
having them trace the number/figure
a narrow angle and bowed iris cast a shadow on the iris

9. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
narrow beam
reading disabilities
0.3 mm

10. With the 1OLMaster - the ideal signal-to-noise ratio is...
to the left of the scleral and orbital echoes
corneal endothelial drop-out
2.0 or more
normal tearing

11. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
red-green
pressing on the globe too hard with the probe
differentiate between congenital or acquired color blindness

12. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
expensive equipment
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis

13. When performing a brightness acuity glare test - it is best to do which of the following?
A Schirmer's test of 10 mm or more is considered normal.
rods
Allow the patient to adjust to the light level before reading the letters.
23 to 24 mm

14. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
narrow beam
having them trace the number/figure
to have little or no shadow
20

15. An A-Sean can he artificially shortened due to...
2 to 3 seconds
0.3 mm
narrow beam
pressing on the globe too hard with the probe

16. Hereditary color vision defects affect...
more males than females
focus can he moved off-axis to obtain a clear reading
ultrasound
0.3 mm

17. Estimating the anterior chamber depth with a penlight works because...
can often be cured if the causative factor is eliminated
the patient should be tested with near correction - if worn
a narrow angle and bowed iris cast a shadow on the iris
desired postoperative refraction

18. The IOLMaster evaluates each of the following except...
red - green - and blue
suspected acquired color defect
refractive error
varies according to the type of test

19. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the patient is shown a sample that is discernable to normal and abnormal alike
severe dry eye
blink
3.0 D

20. Measuring time for the Schirmer's test is...
varies according to the type of test
that the sound beam is directed to the optic disc and the measurement is incorrect
reading disabilities
5 minutes

21. A TBUT of which of the following would indicate tear film dysfunction?
suspected acquired color defect
A-constant
20
10 seconds

22. Schirmer's test does not require _____ except Test strips
tear filter papers
for screening purposes - such as job applications
expensive equipment
patients who have had corneal refractive surgery

23. When calculating intraocular lens (IOL) powers - one must enter...
10 seconds
A-constant
refractive error
desired postoperative refraction

24. Schirmer's test I is used to measure...
reflex tears
a malingerer may invent a number - thus identifying him- or herself
0.3 mm
having them trace the number/figure

25. When positioning the IOLMaster for the axial length reading...
tear filter papers
dacryocystitis
having them trace the number/figure
focus can he moved off-axis to obtain a clear reading

26. The Ishihara color plates are useful...
for screening purposes - such as job applications
narrow beam
A-constant
one-fourth

27. When should a child have his or her color vision checked?
2 to 3 seconds
before starting school
shortened axial length due to compression
having them trace the number/figure

28. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
blink
narrow beam
3.0 D
23 to 24 mm

29. The axial length of an average adult eye is...
one-fourth
23 to 24 mm
the patient is shown a sample that is discernable to normal and abnormal alike
a staining agent

30. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a malingerer may invent a number - thus identifying him- or herself
decrease in vision due to glare conditions
are based on the same general equation
reading disabilities

31. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
remove the instrument from use
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
differentiate between congenital or acquired color blindness

32. When calculating IOL power - each of the following are necessary except...
refractive surgery
remove the instrument from use
545 pm
white to white corneal diameter

33. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
3.0 D
10 seconds
a staining agent

34. Rose bengal is...
10 seconds
a staining agent
patients who have had corneal refractive surgery
that the sound beam is directed to the optic disc and the measurement is incorrect

35. Which eye structure is responsible for color vision?
rods
one-fourth
a staining agent
normal tearing

36. 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)...
the cobalt blue filter
A-constant
shine the light flatly from the side - in the plane of the iris
reading disabilities

37. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
3.0 D
can often be cured if the causative factor is eliminated
Allow the patient to adjust to the light level before reading the letters.

38. One of the keys in accurate pachymetry is...
for screening purposes - such as job applications
holding the probe perpendicular to the corneal surface
pressing on the globe too hard with the probe
white to white corneal diameter

39. Just prior to the beginning of the TBUT test - the patient is instructed to...
pressing on the globe too hard with the probe
blink
corneal endothelial drop-out
the patient should be tested with near correction - if worn

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

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41. When performing the TBUT test - the observer is looking for...
'test eye'
the appearance of dry spots
the cobalt blue filter
10 seconds

42. Schirmer's test II is used to measure...
that the sound beam is directed to the optic disc and the measurement is incorrect
corneal endothelial drop-out
20
normal tearing

43. The axial length of the eye is important in the calculation of...
shortened axial length due to compression
before starting school
IOL power
10 seconds

44. The ideal IOLMaster axial length graph is...
desired postoperative refraction
Allow the patient to adjust to the light level before reading the letters.
23 to 24 mm
a tall - central spike with only one peak and smaller spikes on either site

45. Acquired color vision defects...
the patient is shown a sample that is discernable to normal and abnormal alike
red - green - and blue
can often be cured if the causative factor is eliminated
patients who have had corneal refractive surgery

46. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
shine the light flatly from the side - in the plane of the iris
patients who have had corneal refractive surgery
before starting school

47. Illumination for the color plates test...
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test administered
for screening purposes - such as job applications
the patient should be tested with near correction - if worn

48. Before proceeding with the actual color plate test...
reflex tears
for screening purposes - such as job applications
the patient is shown a sample that is discernable to normal and abnormal alike
having them trace the number/figure

49. The type of pachymetry used to evaluate a glaucoma suspect is...
varies according to the type of test
central corneal thickness
to have little or no shadow
the use of an anesthetic

50. Glare testing is used to identify...
decrease in vision due to glare conditions
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye
posterior subcapsular cataract