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 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)...
A-constant
more males than females
for screening purposes - such as job applications
the use of an anesthetic

2. One of the keys in accurate pachymetry is...
focus can he moved off-axis to obtain a clear reading
holding the probe perpendicular to the corneal surface
dacryocystitis
blink

3. 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
having them trace the number/figure
before starting school
white to white corneal diameter

4. Measuring time for the Schirmer's test is...
20
A Schirmer's test of 10 mm or more is considered normal.
5 minutes
a staining agent

5. Hereditary color vision defects usually affect...
both eyes equally
2 to 3 seconds
'test eye'
pressing on the globe too hard with the probe

6. Young children can be tested using the color plates by...
having them trace the number/figure
focus can he moved off-axis to obtain a clear reading
both eyes equally
tear filter papers

7. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
red - green - and blue
5 minutes
A Schirmer's test of 10 mm or more is considered normal.
20

8. Acquired color vision defects...
can often be cured if the causative factor is eliminated
posterior subcapsular cataract
are based on the same general equation
a staining agent

9. The average central thickness of the human cornea is...
having them trace the number/figure
differentiate between congenital or acquired color blindness
545 pm
the defect tends to remain stable over time

10. A patient with which of the following potential diagnoses would be tested with bengal?
one-fourth
pressing on the globe too hard with the probe
severe dry eye
decrease in vision due to glare conditions

11. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
pressing on the globe too hard with the probe
3.0 D
reflex tears
a malingerer may invent a number - thus identifying him- or herself

12. When performing a brightness acuity glare test - it is best to do which of the following?
normal tearing
for screening purposes - such as job applications
patients who have had corneal refractive surgery
Allow the patient to adjust to the light level before reading the letters.

13. In evaluating an axial length scan - the retinal echo must be...
one-fourth
patients who have had corneal refractive surgery
to the left of the scleral and orbital echoes
having them trace the number/figure

14. The IOLMaster eliminates which of the following sources of error?
reading disabilities
shortened axial length due to compression
IOL power
20

15. Laser interferometry uses which type of laser light?
narrow beam
infrared
A-constant
severe dry eye

16. Glare testing is used to identify...
reflex tears
decrease in vision due to glare conditions
patients who have had corneal refractive surgery
red - green - and blue

17. The Ishihara color plates are useful...
5 minutes
varies according to the type of test administered
for screening purposes - such as job applications
that the sound beam is directed to the optic disc and the measurement is incorrect

18. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
desired postoperative refraction
shortened axial length due to compression
patients who have had corneal refractive surgery
5 minutes

19. _______ are not used in evaluating tear break-up time (TBUT)
remove the instrument from use
desired postoperative refraction
white to white corneal diameter
tear filter papers

20. 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?
differentiate between congenital or acquired color blindness
narrow beam
one-fourth
white to white corneal diameter

21. The photosensitive pigments of the eye are sensitive to...
the appearance of dry spots
red - green - and blue
3.0 D
reflex tears

22. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
rods
the cobalt blue filter
remove the instrument from use

23. When performing pachymetry prior to refractive surgery - it is generally best to begin...
posterior subcapsular cataract
red - green - and blue
with the central cornea
one-fourth

24. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.
can often be cured if the causative factor is eliminated

25. A rose bengal does not require the use of...
the cobalt blue filter
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.
545 pm

26. When calculating IOL power - each of the following are necessary except...
IOL power
patients who have had corneal refractive surgery
red - green - and blue
white to white corneal diameter

27. The axial length of the eye is important in the calculation of...
rods
before starting school
a narrow angle and bowed iris cast a shadow on the iris
IOL power

28. It is important to estimate the anterior chamber depth prior to dilation because...
varies according to the type of test administered
2.0 or more
narrow angles may precipitate an angle-closure glaucoma attack
are based on the same general equation

29. When positioning the IOLMaster for the axial length reading...
refractive surgery
patient wearing spectacles
focus can he moved off-axis to obtain a clear reading
narrow beam

30. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
23 to 24 mm
one-fourth
patient wearing spectacles

31. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
are based on the same general equation
5 minutes
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time

32. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
are based on the same general equation
is acceptable
narrow beam

33. The ideal IOLMaster axial length graph is...
for screening purposes - such as job applications
a tall - central spike with only one peak and smaller spikes on either site
narrow beam
shortened axial length due to compression

34. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
refractive surgery
one-fourth
varies according to the type of test administered

35. The IOLMaster evaluates each of the following except...
to the left of the scleral and orbital echoes
to have little or no shadow
refractive error
with the central cornea

36. When performing the TBUT test - the observer is looking for...
to have little or no shadow
the patient should be tested with near correction - if worn
decrease in vision due to glare conditions
the appearance of dry spots

37. Color vision defects in children are frequently detected among those with...
both eyes equally
reading disabilities
are based on the same general equation
to have little or no shadow

38. If a biometry instrument fails to calibrate properly - one should...
desired postoperative refraction
remove the instrument from use
a malingerer may invent a number - thus identifying him- or herself
patient wearing spectacles

39. Hereditary color vision defects affect...
ultrasound
more males than females
red - green - and blue
dacryocystitis

40. This is not evaluated using rose Bengal except...
20
corneal endothelial drop-out
2 to 3 seconds
remove the instrument from use

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

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42. Schirmer's test does not require _____ except Test strips
expensive equipment
varies according to the type of test
10 seconds
A Schirmer's test of 10 mm or more is considered normal.

43. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
having them trace the number/figure
rods
corneal endothelial drop-out

44. Schirmer's test II is used to measure...
a narrow angle and bowed iris cast a shadow on the iris
for screening purposes - such as job applications
normal tearing
narrow beam

45. The axial length of an average adult eye is...
the defect tends to remain stable over time
normal tearing
23 to 24 mm
the patient is shown a sample that is discernable to normal and abnormal alike

46. 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
the patient is shown a sample that is discernable to normal and abnormal alike
the appearance of dry spots
'test eye'

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

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48. When using color plates - a score indicates abnormal color vision...
white to white corneal diameter
varies according to the type of test
remove the instrument from use
A Schirmer's test of 10 mm or more is considered normal.

49. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
blink
severe dry eye
expensive equipment

50. An A-Sean can he artificially shortened due to...
2.0 or more
A Schirmer's test of 10 mm or more is considered normal.
one-fourth
pressing on the globe too hard with the probe