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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. Almost all of the formulas for calculating IOL power...
are based on the same general equation
the use of an anesthetic
a malingerer may invent a number - thus identifying him- or herself
normal tearing

2. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
23 to 24 mm
the appearance of dry spots
blink

3. Hereditary color vision defects usually affect...
'test eye'
remove the instrument from use
both eyes equally
more males than females

4. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
desired postoperative refraction
varies according to the type of test
patient wearing spectacles
to have little or no shadow

5. In which of the following would glare testing be most appropriate?
to the left of the scleral and orbital echoes
white to white corneal diameter
Allow the patient to adjust to the light level before reading the letters.
posterior subcapsular cataract

6. Young children can be tested using the color plates by...
refractive error
patients who have had corneal refractive surgery
having them trace the number/figure
remove the instrument from use

7. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
refractive error
20
ultrasound
remove the instrument from use

8. 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...
tear filter papers
'test eye'
23 to 24 mm
that the sound beam is directed to the optic disc and the measurement is incorrect

9. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
narrow beam
suspected acquired color defect
differentiate between congenital or acquired color blindness
patients who have had corneal refractive surgery

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

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11. The average central thickness of the human cornea is...
one-fourth
infrared
545 pm
IOL power

12. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
to the left of the scleral and orbital echoes
shine the light flatly from the side - in the plane of the iris
the defect tends to remain stable over time

13. When performing a brightness acuity glare test - it is best to do which of the following?
severe dry eye
are based on the same general equation
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.

14. It is important to estimate the anterior chamber depth prior to dilation because...
is acceptable
decrease in vision due to glare conditions
narrow angles may precipitate an angle-closure glaucoma attack
tear filter papers

15. When using a penlight to estimate anterior chamber depth - an open angle would appear...
remove the instrument from use
the use of an anesthetic
to have little or no shadow
are based on the same general equation

16. The IOLMaster eliminates which of the following sources of error?
patient wearing spectacles
reading disabilities
shortened axial length due to compression
to have little or no shadow

17. Laser interferometry uses which type of laser light?
20
with the central cornea
before starting school
infrared

18. When performing pachymetry prior to refractive surgery - it is generally best to begin...
holding the probe perpendicular to the corneal surface
'test eye'
with the central cornea
reading disabilities

19. A rose bengal does not require the use of...
narrow angles may precipitate an angle-closure glaucoma attack
pressing on the globe too hard with the probe
the cobalt blue filter
corneal endothelial drop-out

20. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test
the defect tends to remain stable over time
blink

21. One of the keys in accurate pachymetry is...
is acceptable
refractive surgery
the appearance of dry spots
holding the probe perpendicular to the corneal surface

22. Illumination for the color plates test...
reading disabilities
remove the instrument from use
varies according to the type of test administered
the appearance of dry spots

23. If a biometry instrument fails to calibrate properly - one should...
red-green
remove the instrument from use
decrease in vision due to glare conditions
0.3 mm

24. The axial length of the eye is important in the calculation of...
dacryocystitis
corneal endothelial drop-out
Allow the patient to adjust to the light level before reading the letters.
IOL power

25. Acquired color vision defects...
5 minutes
can often be cured if the causative factor is eliminated
10 seconds
narrow beam

26. Which of the following should be color-vision tested one eye at a time?
remove the instrument from use
suspected acquired color defect
blink
a malingerer may invent a number - thus identifying him- or herself

27. Schirmer's test I is used to measure...
A Schirmer's test of 10 mm or more is considered normal.
reflex tears
IOL power
suspected acquired color defect

28. A TBUT of which of the following would indicate tear film dysfunction?
A-constant
10 seconds
desired postoperative refraction
patients who have had corneal refractive surgery

29. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
expensive equipment
545 pm
blink

30. An A-Sean can he artificially shortened due to...
the appearance of dry spots
tear filter papers
pressing on the globe too hard with the probe
the patient should be tested with near correction - if worn

31. When should a child have his or her color vision checked?
before starting school
3.0 D
5 minutes
with the central cornea

32. The difference between Schirmer's test I and II is...
with the central cornea
can often be cured if the causative factor is eliminated
rods
the use of an anesthetic

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

34. Color vision defects in children are frequently detected among those with...
A-constant
expensive equipment
reading disabilities
red - green - and blue

35. Schirmer's test II is used to measure...
normal tearing
Allow the patient to adjust to the light level before reading the letters.
10 seconds
23 to 24 mm

36. Measuring corneal thickness via nonoptical pachymetry involves the use of...
2.0 or more
ultrasound
patients who have had corneal refractive surgery
central corneal thickness

37. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
A-constant
the defect tends to remain stable over time
IOL power
severe dry eye

38. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
'test eye'
reading disabilities

39. 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
suspected acquired color defect
the defect tends to remain stable over time
patients who have had corneal refractive surgery

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

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41. The IOLMaster evaluates each of the following except...
refractive error
a staining agent
the appearance of dry spots
for screening purposes - such as job applications

42. How long should the patient be given to recognize the figure in a color plate?
a staining agent
with the central cornea
decrease in vision due to glare conditions
2 to 3 seconds

43. Which eye structure is responsible for color vision?
'test eye'
rods
the defect tends to remain stable over time
both eyes equally

44. In evaluating an axial length scan - the retinal echo must be...
a staining agent
to the left of the scleral and orbital echoes
shine the light flatly from the side - in the plane of the iris
narrow angles may precipitate an angle-closure glaucoma attack

45. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect
shine the light flatly from the side - in the plane of the iris

46. A patient with which of the following potential diagnoses would be tested with bengal?
suspected acquired color defect
severe dry eye
the defect tends to remain stable over time
3.0 D

47. When calculating intraocular lens (IOL) powers - one must enter...
the cobalt blue filter
2 to 3 seconds
desired postoperative refraction
is acceptable

48. _______ are not used in evaluating tear break-up time (TBUT)
red-green
tear filter papers
'test eye'
focus can he moved off-axis to obtain a clear reading

49. In test a patient with the color pseudoisochromatic plates...
remove the instrument from use
a malingerer may invent a number - thus identifying him- or herself
the patient should be tested with near correction - if worn
dacryocystitis

50. Hereditary color vision defects affect...
more males than females
A-constant
varies according to the type of test administered
refractive surgery

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Certified Ophthalmic Assistant

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