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Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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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 axial length of the eye is important in the calculation of...
reflex tears
shine the light flatly from the side - in the plane of the iris
IOL power
a staining agent

2. When calculating intraocular lens (IOL) powers - one must enter...
normal tearing
corneal endothelial drop-out
desired postoperative refraction
3.0 D

3. Estimating the anterior chamber depth with a penlight works because...
posterior subcapsular cataract
central corneal thickness
a narrow angle and bowed iris cast a shadow on the iris
23 to 24 mm

4. When performing pachymetry prior to refractive surgery - it is generally best to begin...
rods
2.0 or more
with the central cornea
the patient is shown a sample that is discernable to normal and abnormal alike

5. Just prior to the beginning of the TBUT test - the patient is instructed to...
A Schirmer's test of 10 mm or more is considered normal.
red-green
reading disabilities
blink

6. The ideal IOLMaster axial length graph is...
varies according to the type of test administered
Allow the patient to adjust to the light level before reading the letters.
patients who have had corneal refractive surgery
a tall - central spike with only one peak and smaller spikes on either site

7. 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
5 minutes
the defect tends to remain stable over time
to the left of the scleral and orbital echoes

8. The Ishihara color plates are useful...
the use of an anesthetic
IOL power
for screening purposes - such as job applications
blink

9. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
one-fourth
refractive surgery
blink

10. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
are based on the same general equation
rods
for screening purposes - such as job applications
3.0 D

11. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
red-green
5 minutes
'test eye'

12. The IOLMaster eliminates which of the following sources of error?
varies according to the type of test administered
normal tearing
can often be cured if the causative factor is eliminated
shortened axial length due to compression

13. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
for screening purposes - such as job applications
severe dry eye
10 seconds
is acceptable

14. Laser interferometry uses which type of laser light?
infrared
varies according to the type of test
both eyes equally
before starting school

15. Young children can be tested using the color plates by...
refractive error
545 pm
can often be cured if the causative factor is eliminated
having them trace the number/figure

16. When using color plates - a score indicates abnormal color vision...
0.3 mm
are based on the same general equation
is acceptable
varies according to the type of test

17. When calculating IOL power - each of the following are necessary except...
central corneal thickness
white to white corneal diameter
reading disabilities
differentiate between congenital or acquired color blindness

18. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
more males than females
dacryocystitis
blink

19. Schirmer's test II is used to measure...
both eyes equally
normal tearing
A-constant
corneal endothelial drop-out

20. Schirmer's test I is used to measure...
reflex tears
differentiate between congenital or acquired color blindness
IOL power
the use of an anesthetic

21. In evaluating an axial length scan - the retinal echo must be...
10 seconds
the use of an anesthetic
for screening purposes - such as job applications
to the left of the scleral and orbital echoes

22. If a biometry instrument fails to calibrate properly - one should...
white to white corneal diameter
differentiate between congenital or acquired color blindness
remove the instrument from use
both eyes equally

23. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
both eyes equally
the patient should be tested with near correction - if worn
2.0 or more

24. 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
patient wearing spectacles
posterior subcapsular cataract
2.0 or more

25. A TBUT of which of the following would indicate tear film dysfunction?
expensive equipment
10 seconds
differentiate between congenital or acquired color blindness
narrow angles may precipitate an angle-closure glaucoma attack

26. Which eye structure is responsible for color vision?
rods
to the left of the scleral and orbital echoes
patient wearing spectacles
are based on the same general equation

27. The difference between Schirmer's test I and II is...
the use of an anesthetic
corneal endothelial drop-out
the cobalt blue filter
10 seconds

28. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
a tall - central spike with only one peak and smaller spikes on either site
expensive equipment
a narrow angle and bowed iris cast a shadow on the iris

29. 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...
IOL power
infrared
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect

30. Before proceeding with the actual color plate test...
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike
is acceptable
dacryocystitis

31. This is not evaluated using rose Bengal except...
the appearance of dry spots
remove the instrument from use
with the central cornea
corneal endothelial drop-out

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

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33. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
reading disabilities
2 to 3 seconds
20

34. Color vision defects in children are frequently detected among those with...
reading disabilities
a staining agent
'test eye'
narrow angles may precipitate an angle-closure glaucoma attack

35. Hereditary color defects most often fall into which category?
normal tearing
red-green
the appearance of dry spots
is acceptable

36. Measuring time for the Schirmer's test is...
desired postoperative refraction
5 minutes
pressing on the globe too hard with the probe
the use of an anesthetic

37. Acquired color vision defects...
can often be cured if the causative factor is eliminated
0.3 mm
20
red-green

38. Rose bengal is...
corneal endothelial drop-out
a staining agent
normal tearing
5 minutes

39. A rose bengal does not require the use of...
remove the instrument from use
the cobalt blue filter
the defect tends to remain stable over time
refractive error

40. In test a patient with the color pseudoisochromatic plates...
red-green
0.3 mm
normal tearing
the patient should be tested with near correction - if worn

41. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
reading disabilities
5 minutes
patient wearing spectacles
2.0 or more

42. An A-Sean can he artificially shortened due to...
the patient is shown a sample that is discernable to normal and abnormal alike
central corneal thickness
to have little or no shadow
pressing on the globe too hard with the probe

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?
a narrow angle and bowed iris cast a shadow on the iris
before starting school
white to white corneal diameter
0.3 mm

44. Illumination for the color plates test...
holding the probe perpendicular to the corneal surface
varies according to the type of test administered
a staining agent
the patient is shown a sample that is discernable to normal and abnormal alike

45. 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?
one-fourth
can often be cured if the causative factor is eliminated
holding the probe perpendicular to the corneal surface
the patient should be tested with near correction - if worn

46. When performing a brightness acuity glare test - it is best to do which of the following?
with the central cornea
having them trace the number/figure
Allow the patient to adjust to the light level before reading the letters.
white to white corneal diameter

47. Color vision testing is used to detect all of the following except...
the patient should be tested with near correction - if worn
varies according to the type of test administered
differentiate between congenital or acquired color blindness
having them trace the number/figure

48. The average central thickness of the human cornea is...
with the central cornea
desired postoperative refraction
a tall - central spike with only one peak and smaller spikes on either site
545 pm

49. Pachymetry readings are routinely taken prior to...
the patient is shown a sample that is discernable to normal and abnormal alike
focus can he moved off-axis to obtain a clear reading
refractive surgery
a staining agent

50. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
differentiate between congenital or acquired color blindness
patients who have had corneal refractive surgery
expensive equipment

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Certified Ophthalmic Assistant

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