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. An A-Sean can he artificially shortened due to...
one-fourth
2 to 3 seconds
dacryocystitis
pressing on the globe too hard with the probe

2. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
suspected acquired color defect
desired postoperative refraction
ultrasound

3. A rose bengal does not require the use of...
the cobalt blue filter
before starting school
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack

4. 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
2.0 or more
the patient is shown a sample that is discernable to normal and abnormal alike
severe dry eye

5. The Ishihara color plates are useful...
for screening purposes - such as job applications
20
narrow angles may precipitate an angle-closure glaucoma attack
differentiate between congenital or acquired color blindness

6. When calculating intraocular lens (IOL) powers - one must enter...
the patient should be tested with near correction - if worn
desired postoperative refraction
varies according to the type of test administered
focus can he moved off-axis to obtain a clear reading

7. Laser interferometry uses which type of laser light?
to have little or no shadow
with the central cornea
focus can he moved off-axis to obtain a clear reading
infrared

8. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
having them trace the number/figure
is acceptable
the patient is shown a sample that is discernable to normal and abnormal alike
a staining agent

9. Pachymetry readings are routinely taken prior to...
holding the probe perpendicular to the corneal surface
decrease in vision due to glare conditions
refractive surgery
the patient is shown a sample that is discernable to normal and abnormal alike

10. Color vision defects in children are frequently detected among those with...
reading disabilities
to the left of the scleral and orbital echoes
white to white corneal diameter
a staining agent

11. A patient with which of the following potential diagnoses would be tested with bengal?
desired postoperative refraction
is acceptable
severe dry eye
rods

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

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13. Hereditary color vision defects usually affect...
both eyes equally
the appearance of dry spots
severe dry eye
the use of an anesthetic

14. When performing pachymetry prior to refractive surgery - it is generally best to begin...
expensive equipment
with the central cornea
posterior subcapsular cataract
suspected acquired color defect

15. The difference between Schirmer's test I and II is...
the use of an anesthetic
both eyes equally
pressing on the globe too hard with the probe
the cobalt blue filter

16. Measuring time for the Schirmer's test is...
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
a malingerer may invent a number - thus identifying him- or herself
5 minutes

17. When using a penlight to estimate anterior chamber depth - an open angle would appear...
3.0 D
severe dry eye
to have little or no shadow
shortened axial length due to compression

18. With the 1OLMaster - the ideal signal-to-noise ratio is...
varies according to the type of test administered
the patient should be tested with near correction - if worn
2.0 or more
can often be cured if the causative factor is eliminated

19. How long should the patient be given to recognize the figure in a color plate?
is acceptable
the patient should be tested with near correction - if worn
2 to 3 seconds
refractive error

20. A color plate that shows no obvious number to normal and abnormal alike is useful because...
the appearance of dry spots
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself
the use of an anesthetic

21. It is important to estimate the anterior chamber depth prior to dilation because...
tear filter papers
patients who have had corneal refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack
the appearance of dry spots

22. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
narrow angles may precipitate an angle-closure glaucoma attack
A Schirmer's test of 10 mm or more is considered normal.
red - green - and blue

23. In test a patient with the color pseudoisochromatic plates...
red - green - and blue
the appearance of dry spots
the patient should be tested with near correction - if worn
differentiate between congenital or acquired color blindness

24. Color vision testing is used to detect all of the following except...
5 minutes
blink
10 seconds
differentiate between congenital or acquired color blindness

25. Schirmer's test does not require _____ except Test strips
dacryocystitis
expensive equipment
corneal endothelial drop-out
tear filter papers

26. Hereditary color vision defects affect...
shortened axial length due to compression
the defect tends to remain stable over time
more males than females
expensive equipment

27. When positioning the IOLMaster for the axial length reading...
20
reflex tears
dacryocystitis
focus can he moved off-axis to obtain a clear reading

28. The IOLMaster evaluates each of the following except...
545 pm
3.0 D
refractive error
patients who have had corneal refractive surgery

29. Almost all of the formulas for calculating IOL power...
A Schirmer's test of 10 mm or more is considered normal.
narrow beam
are based on the same general equation
shortened axial length due to compression

30. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
3.0 D
both eyes equally
Allow the patient to adjust to the light level before reading the letters.

31. When should a child have his or her color vision checked?
can often be cured if the causative factor is eliminated
before starting school
the appearance of dry spots
desired postoperative refraction

32. The axial length of an average adult eye is...
red-green
the patient is shown a sample that is discernable to normal and abnormal alike
23 to 24 mm
narrow angles may precipitate an angle-closure glaucoma attack

33. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
a tall - central spike with only one peak and smaller spikes on either site
white to white corneal diameter
corneal endothelial drop-out

34. The Schirmer's test might be indicated in all of the following except...
central corneal thickness
A-constant
dacryocystitis
for screening purposes - such as job applications

35. One of the keys in accurate pachymetry is...
are based on the same general equation
to have little or no shadow
A Schirmer's test of 10 mm or more is considered normal.
holding the probe perpendicular to the corneal surface

36. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
red - green - and blue
expensive equipment
545 pm

37. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
focus can he moved off-axis to obtain a clear reading
the defect tends to remain stable over time
is acceptable

38. Illumination for the color plates test...
to the left of the scleral and orbital echoes
varies according to the type of test administered
that the sound beam is directed to the optic disc and the measurement is incorrect
desired postoperative refraction

39. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
545 pm
patients who have had corneal refractive surgery
the patient is shown a sample that is discernable to normal and abnormal alike
desired postoperative refraction

40. Hereditary color defects most often fall into which category?
the cobalt blue filter
to have little or no shadow
3.0 D
red-green

41. The photosensitive pigments of the eye are sensitive to...
normal tearing
is acceptable
red - green - and blue
10 seconds

42. Schirmer's test II is used to measure...
one-fourth
normal tearing
Allow the patient to adjust to the light level before reading the letters.
infrared

43. When comparing the axial lengths of a patient's left and right eye - how much of a difference between the eyes should signal you to repeat the measurement of both eyes?
both eyes equally
before starting school
0.3 mm
IOL power

44. In which of the following would glare testing be most appropriate?
central corneal thickness
posterior subcapsular cataract
shortened axial length due to compression
infrared

45. Schirmer's test I is used to measure...
the cobalt blue filter
reflex tears
23 to 24 mm
2 to 3 seconds

46. Estimating the anterior chamber depth with a penlight works because...
can often be cured if the causative factor is eliminated
for screening purposes - such as job applications
2 to 3 seconds
a narrow angle and bowed iris cast a shadow on the iris

47. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
a tall - central spike with only one peak and smaller spikes on either site
desired postoperative refraction
shine the light flatly from the side - in the plane of the iris
5 minutes

48. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
decrease in vision due to glare conditions
5 minutes
both eyes equally

49. The ideal IOLMaster axial length graph is...
ultrasound
a tall - central spike with only one peak and smaller spikes on either site
the defect tends to remain stable over time
the patient should be tested with near correction - if worn

50. When calculating IOL power - each of the following are necessary except...
23 to 24 mm
white to white corneal diameter
for screening purposes - such as job applications
a staining agent