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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. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
red-green
a staining agent
one-fourth

2. In test a patient with the color pseudoisochromatic plates...
0.3 mm
narrow angles may precipitate an angle-closure glaucoma attack
the patient should be tested with near correction - if worn
severe dry eye

3. 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?
focus can he moved off-axis to obtain a clear reading
5 minutes
one-fourth
infrared

4. Rose bengal is...
a staining agent
remove the instrument from use
5 minutes
are based on the same general equation

5. Acquired color vision defects...
the appearance of dry spots
can often be cured if the causative factor is eliminated
reflex tears
A Schirmer's test of 10 mm or more is considered normal.

6. The axial length of the eye is important in the calculation of...
IOL power
20
expensive equipment
desired postoperative refraction

7. When performing the TBUT test - the observer is looking for...
pressing on the globe too hard with the probe
the appearance of dry spots
blink
central corneal thickness

8. When using a penlight to estimate anterior chamber depth - an open angle would appear...
both eyes equally
to have little or no shadow
the defect tends to remain stable over time
having them trace the number/figure

9. When should a child have his or her color vision checked?
refractive surgery
23 to 24 mm
before starting school
infrared

10. The photosensitive pigments of the eye are sensitive to...
red-green
one-fourth
red - green - and blue
suspected acquired color defect

11. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
3.0 D
A-constant
20
blink

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. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
is acceptable
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth

14. Which of the following should be color-vision tested one eye at a time?
expensive equipment
pressing on the globe too hard with the probe
suspected acquired color defect
the patient is shown a sample that is discernable to normal and abnormal alike

15. When calculating intraocular lens (IOL) powers - one must enter...
infrared
desired postoperative refraction
the use of an anesthetic
tear filter papers

16. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
tear filter papers
patient wearing spectacles
reading disabilities

17. The axial length of an average adult eye is...
normal tearing
with the central cornea
narrow beam
23 to 24 mm

18. When calculating IOL power - each of the following are necessary except...
reflex tears
white to white corneal diameter
varies according to the type of test administered
shine the light flatly from the side - in the plane of the iris

19. A TBUT of which of the following would indicate tear film dysfunction?
23 to 24 mm
10 seconds
infrared
severe dry eye

20. Almost all of the formulas for calculating IOL power...
more males than females
are based on the same general equation
for screening purposes - such as job applications
IOL power

21. Schirmer's test does not require _____ except Test strips
expensive equipment
are based on the same general equation
the cobalt blue filter
A Schirmer's test of 10 mm or more is considered normal.

22. The Schirmer's test might be indicated in all of the following except...
the cobalt blue filter
can often be cured if the causative factor is eliminated
dacryocystitis
are based on the same general equation

23. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
A Schirmer's test of 10 mm or more is considered normal.
pressing on the globe too hard with the probe
patients who have had corneal refractive surgery
remove the instrument from use

24. Pachymetry readings are routinely taken prior to...
refractive surgery
the defect tends to remain stable over time
corneal endothelial drop-out
varies according to the type of test

25. When positioning the IOLMaster for the axial length reading...
Allow the patient to adjust to the light level before reading the letters.
focus can he moved off-axis to obtain a clear reading
IOL power
2 to 3 seconds

26. Hereditary color vision defects usually affect...
reading disabilities
is acceptable
infrared
both eyes equally

27. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
patients who have had corneal refractive surgery
shine the light flatly from the side - in the plane of the iris
10 seconds
the patient is shown a sample that is discernable to normal and abnormal alike

28. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.
the appearance of dry spots
patient wearing spectacles

29. Just prior to the beginning of the TBUT test - the patient is instructed to...
a narrow angle and bowed iris cast a shadow on the iris
blink
refractive error
to have little or no shadow

30. A patient with which of the following potential diagnoses would be tested with bengal?
both eyes equally
a narrow angle and bowed iris cast a shadow on the iris
decrease in vision due to glare conditions
severe dry eye

31. 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)...
with the central cornea
narrow beam
A-constant
0.3 mm

32. Measuring time for the Schirmer's test is...
the use of an anesthetic
tear filter papers
5 minutes
severe dry eye

33. Estimating the anterior chamber depth with a penlight works because...
both eyes equally
differentiate between congenital or acquired color blindness
'test eye'
a narrow angle and bowed iris cast a shadow on the iris

34. A rose bengal does not require the use of...
the cobalt blue filter
pressing on the globe too hard with the probe
the use of an anesthetic
decrease in vision due to glare conditions

35. Glare testing is used to identify...
severe dry eye
white to white corneal diameter
decrease in vision due to glare conditions
holding the probe perpendicular to the corneal surface

36. Hereditary color vision defects affect...
holding the probe perpendicular to the corneal surface
refractive surgery
ultrasound
more males than females

37. The ideal IOLMaster axial length graph is...
to the left of the scleral and orbital echoes
normal tearing
a tall - central spike with only one peak and smaller spikes on either site
both eyes equally

38. A color plate that shows no obvious number to normal and abnormal alike is useful because...
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
with the central cornea
10 seconds

39. Laser interferometry uses which type of laser light?
is acceptable
patients who have had corneal refractive surgery
2.0 or more
infrared

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

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41. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
holding the probe perpendicular to the corneal surface
reflex tears
central corneal thickness

42. When performing pachymetry prior to refractive surgery - it is generally best to begin...
the patient is shown a sample that is discernable to normal and abnormal alike
narrow angles may precipitate an angle-closure glaucoma attack
can often be cured if the causative factor is eliminated
with the central cornea

43. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
red-green
reflex tears
white to white corneal diameter

44. When performing a brightness acuity glare test - it is best to do which of the following?
reflex tears
Allow the patient to adjust to the light level before reading the letters.
patient wearing spectacles
the use of an anesthetic

45. Schirmer's test II is used to measure...
red - green - and blue
tear filter papers
rods
normal tearing

46. In evaluating an axial length scan - the retinal echo must be...
a staining agent
refractive surgery
2 to 3 seconds
to the left of the scleral and orbital echoes

47. When using color plates - a score indicates abnormal color vision...
refractive error
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.
a malingerer may invent a number - thus identifying him- or herself

48. One of the keys in accurate pachymetry is...
tear filter papers
holding the probe perpendicular to the corneal surface
A-constant
can often be cured if the causative factor is eliminated

49. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
narrow beam
the defect tends to remain stable over time
tear filter papers
3.0 D

50. Measuring corneal thickness via nonoptical pachymetry involves the use of...
white to white corneal diameter
severe dry eye
0.3 mm
ultrasound

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Certified Ophthalmic Assistant

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