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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. When performing a brightness acuity glare test - it is best to do which of the following?
corneal endothelial drop-out
both eyes equally
Allow the patient to adjust to the light level before reading the letters.
IOL power

2. In test a patient with the color pseudoisochromatic plates...
red - green - and blue
the patient should be tested with near correction - if worn
refractive surgery
are based on the same general equation

3. When positioning the IOLMaster for the axial length reading...
a staining agent
focus can he moved off-axis to obtain a clear reading
shortened axial length due to compression
holding the probe perpendicular to the corneal surface

4. 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)...
rods
A-constant
before starting school
corneal endothelial drop-out

5. The photosensitive pigments of the eye are sensitive to...
IOL power
to have little or no shadow
2 to 3 seconds
red - green - and blue

6. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
a staining agent
pressing on the globe too hard with the probe
expensive equipment

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

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8. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
pressing on the globe too hard with the probe
ultrasound
varies according to the type of test administered

9. Hereditary color vision defects affect...
remove the instrument from use
more males than females
reflex tears
focus can he moved off-axis to obtain a clear reading

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

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11. Measuring time for the Schirmer's test is...
5 minutes
refractive surgery
the cobalt blue filter
blink

12. Almost all of the formulas for calculating IOL power...
are based on the same general equation
remove the instrument from use
to have little or no shadow
ultrasound

13. The Ishihara color plates are useful...
the use of an anesthetic
narrow beam
for screening purposes - such as job applications
having them trace the number/figure

14. The axial length of an average adult eye is...
reflex tears
23 to 24 mm
0.3 mm
shortened axial length due to compression

15. The average central thickness of the human cornea is...
normal tearing
545 pm
varies according to the type of test
'test eye'

16. The Schirmer's test might be indicated in all of the following except...
narrow angles may precipitate an angle-closure glaucoma attack
Allow the patient to adjust to the light level before reading the letters.
dacryocystitis
reflex tears

17. The ideal IOLMaster axial length graph is...
infrared
to have little or no shadow
a tall - central spike with only one peak and smaller spikes on either site
refractive surgery

18. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness
is acceptable
patient wearing spectacles

19. When should a child have his or her color vision checked?
before starting school
a staining agent
A-constant
3.0 D

20. One of the keys in accurate pachymetry is...
having them trace the number/figure
are based on the same general equation
severe dry eye
holding the probe perpendicular to the corneal surface

21. Color vision testing is used to detect all of the following except...
reflex tears
2 to 3 seconds
differentiate between congenital or acquired color blindness
refractive error

22. When using color plates - a score indicates abnormal color vision...
more males than females
for screening purposes - such as job applications
varies according to the type of test
the defect tends to remain stable over time

23. The IOLMaster eliminates which of the following sources of error?
decrease in vision due to glare conditions
shortened axial length due to compression
normal tearing
remove the instrument from use

24. Schirmer's test II is used to measure...
normal tearing
can often be cured if the causative factor is eliminated
the defect tends to remain stable over time
having them trace the number/figure

25. Just prior to the beginning of the TBUT test - the patient is instructed to...
central corneal thickness
blink
refractive surgery
can often be cured if the causative factor is eliminated

26. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
blink
varies according to the type of test
that the sound beam is directed to the optic disc and the measurement is incorrect

27. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shortened axial length due to compression
white to white corneal diameter
expensive equipment
shine the light flatly from the side - in the plane of the iris

28. The IOLMaster evaluates each of the following except...
more males than females
refractive error
normal tearing
20

29. Color vision defects in children are frequently detected among those with...
are based on the same general equation
both eyes equally
reading disabilities
expensive equipment

30. 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
both eyes equally
focus can he moved off-axis to obtain a clear reading
3.0 D

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
suspected acquired color defect
with the central cornea
20
ultrasound

32. Which eye structure is responsible for color vision?
rods
can often be cured if the causative factor is eliminated
varies according to the type of test
the patient is shown a sample that is discernable to normal and abnormal alike

33. The difference between Schirmer's test I and II is...
infrared
refractive error
the use of an anesthetic
5 minutes

34. Estimating the anterior chamber depth with a penlight works because...
shortened axial length due to compression
shine the light flatly from the side - in the plane of the iris
a narrow angle and bowed iris cast a shadow on the iris
holding the probe perpendicular to the corneal surface

35. Pachymetry readings are routinely taken prior to...
the cobalt blue filter
pressing on the globe too hard with the probe
patients who have had corneal refractive surgery
refractive surgery

36. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the cobalt blue filter
posterior subcapsular cataract
3.0 D
expensive equipment

37. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
decrease in vision due to glare conditions
central corneal thickness
dacryocystitis

38. Rose bengal is...
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike
a staining agent
differentiate between congenital or acquired color blindness

39. Schirmer's test I is used to measure...
patients who have had corneal refractive surgery
the appearance of dry spots
reflex tears
tear filter papers

40. Acquired color vision defects...
20
desired postoperative refraction
red-green
can often be cured if the causative factor is eliminated

41. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
the patient should be tested with near correction - if worn
shortened axial length due to compression
red - green - and blue

42. _______ are not used in evaluating tear break-up time (TBUT)
can often be cured if the causative factor is eliminated
posterior subcapsular cataract
before starting school
tear filter papers

43. It is important to estimate the anterior chamber depth prior to dilation because...
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself
before starting school
narrow angles may precipitate an angle-closure glaucoma attack

44. Laser interferometry uses which type of laser light?
central corneal thickness
infrared
remove the instrument from use
0.3 mm

45. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
with the central cornea
desired postoperative refraction
is acceptable
that the sound beam is directed to the optic disc and the measurement is incorrect

46. Glare testing is used to identify...
posterior subcapsular cataract
decrease in vision due to glare conditions
ultrasound
more males than females

47. Which of the following should be color-vision tested one eye at a time?
patient wearing spectacles
suspected acquired color defect
to have little or no shadow
2 to 3 seconds

48. A TBUT of which of the following would indicate tear film dysfunction?
red-green
corneal endothelial drop-out
10 seconds
the appearance of dry spots

49. Hereditary color defects most often fall into which category?
is acceptable
varies according to the type of test administered
red-green
IOL power

50. Before proceeding with the actual color plate test...
a staining agent
the patient is shown a sample that is discernable to normal and abnormal alike
for screening purposes - such as job applications
3.0 D

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Certified Ophthalmic Assistant

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