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 IOLMaster eliminates which of the following sources of error?
decrease in vision due to glare conditions
tear filter papers
a malingerer may invent a number - thus identifying him- or herself
shortened axial length due to compression

2. Rose bengal is...
one-fourth
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
a staining agent

3. When calculating intraocular lens (IOL) powers - one must enter...
are based on the same general equation
desired postoperative refraction
refractive error
pressing on the globe too hard with the probe

4. How long should the patient be given to recognize the figure in a color plate?
narrow beam
varies according to the type of test administered
A-constant
2 to 3 seconds

5. Measuring corneal thickness via nonoptical pachymetry involves the use of...
the cobalt blue filter
the patient is shown a sample that is discernable to normal and abnormal alike
to the left of the scleral and orbital echoes
ultrasound

6. The type of pachymetry used to evaluate a glaucoma suspect is...
normal tearing
central corneal thickness
2 to 3 seconds
the cobalt blue filter

7. Color vision defects in children are frequently detected among those with...
10 seconds
a narrow angle and bowed iris cast a shadow on the iris
refractive surgery
reading disabilities

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

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9. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
posterior subcapsular cataract
shortened axial length due to compression
is acceptable
differentiate between congenital or acquired color blindness

10. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
reflex tears
a narrow angle and bowed iris cast a shadow on the iris
narrow beam

11. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
varies according to the type of test administered
a malingerer may invent a number - thus identifying him- or herself
the cobalt blue filter

12. With the 1OLMaster - the ideal signal-to-noise ratio is...
focus can he moved off-axis to obtain a clear reading
2.0 or more
23 to 24 mm
rods

13. 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?
expensive equipment
differentiate between congenital or acquired color blindness
a narrow angle and bowed iris cast a shadow on the iris
one-fourth

14. When performing the TBUT test - the observer is looking for...
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots
red-green
patient wearing spectacles

15. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
that the sound beam is directed to the optic disc and the measurement is incorrect
central corneal thickness
is acceptable

16. Hereditary color defects most often fall into which category?
red-green
can often be cured if the causative factor is eliminated
545 pm
the patient is shown a sample that is discernable to normal and abnormal alike

17. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the cobalt blue filter
blink
patients who have had corneal refractive surgery
A Schirmer's test of 10 mm or more is considered normal.

18. Schirmer's test I is used to measure...
expensive equipment
narrow angles may precipitate an angle-closure glaucoma attack
reflex tears
shortened axial length due to compression

19. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
5 minutes
differentiate between congenital or acquired color blindness
the patient should be tested with near correction - if worn

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

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21. One of the keys in accurate pachymetry is...
the cobalt blue filter
holding the probe perpendicular to the corneal surface
to the left of the scleral and orbital echoes
can often be cured if the causative factor is eliminated

22. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
one-fourth
both eyes equally
the defect tends to remain stable over time
narrow beam

23. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
A Schirmer's test of 10 mm or more is considered normal.
pressing on the globe too hard with the probe
reflex tears

24. Young children can be tested using the color plates by...
having them trace the number/figure
blink
remove the instrument from use
varies according to the type of test administered

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

26. Pachymetry readings are routinely taken prior to...
dacryocystitis
white to white corneal diameter
refractive surgery
2 to 3 seconds

27. A rose bengal does not require the use of...
more males than females
the patient should be tested with near correction - if worn
the cobalt blue filter
varies according to the type of test administered

28. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
pressing on the globe too hard with the probe
both eyes equally
20
tear filter papers

29. Before proceeding with the actual color plate test...
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
the patient should be tested with near correction - if worn
dacryocystitis

30. Glare testing is used to identify...
decrease in vision due to glare conditions
the defect tends to remain stable over time
before starting school
normal tearing

31. When using a penlight to estimate anterior chamber depth - an open angle would appear...
with the central cornea
dacryocystitis
to have little or no shadow
refractive error

32. Measuring time for the Schirmer's test is...
remove the instrument from use
before starting school
5 minutes
the appearance of dry spots

33. The axial length of an average adult eye is...
both eyes equally
the appearance of dry spots
23 to 24 mm
expensive equipment

34. When using color plates - a score indicates abnormal color vision...
a staining agent
the patient should be tested with near correction - if worn
varies according to the type of test
patients who have had corneal refractive surgery

35. In test a patient with the color pseudoisochromatic plates...
A Schirmer's test of 10 mm or more is considered normal.
red-green
focus can he moved off-axis to obtain a clear reading
the patient should be tested with near correction - if worn

36. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
before starting school
10 seconds
the defect tends to remain stable over time
more males than females

37. Schirmer's test does not require _____ except Test strips
patients who have had corneal refractive surgery
white to white corneal diameter
expensive equipment
20

38. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
a staining agent
patient wearing spectacles
shine the light flatly from the side - in the plane of the iris

39. Almost all of the formulas for calculating IOL power...
are based on the same general equation
the appearance of dry spots
0.3 mm
severe dry eye

40. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
dacryocystitis
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test

41. The photosensitive pigments of the eye are sensitive to...
white to white corneal diameter
central corneal thickness
red - green - and blue
2.0 or more

42. 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
reading disabilities
corneal endothelial drop-out
differentiate between congenital or acquired color blindness

43. Hereditary color vision defects usually affect...
desired postoperative refraction
with the central cornea
both eyes equally
that the sound beam is directed to the optic disc and the measurement is incorrect

44. The Schirmer's test might be indicated in all of the following except...
narrow angles may precipitate an angle-closure glaucoma attack
dacryocystitis
pressing on the globe too hard with the probe
white to white corneal diameter

45. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
3.0 D
a malingerer may invent a number - thus identifying him- or herself
tear filter papers

46. Hereditary color vision defects affect...
more males than females
decrease in vision due to glare conditions
white to white corneal diameter
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...
focus can he moved off-axis to obtain a clear reading
a tall - central spike with only one peak and smaller spikes on either site
differentiate between congenital or acquired color blindness
shine the light flatly from the side - in the plane of the iris

48. When performing a brightness acuity glare test - it is best to do which of the following?
central corneal thickness
2.0 or more
Allow the patient to adjust to the light level before reading the letters.
normal tearing

49. A color plate that shows no obvious number to normal and abnormal alike is useful because...
remove the instrument from use
a malingerer may invent a number - thus identifying him- or herself
'test eye'
patient wearing spectacles

50. Laser interferometry uses which type of laser light?
to the left of the scleral and orbital echoes
that the sound beam is directed to the optic disc and the measurement is incorrect
infrared
pressing on the globe too hard with the probe