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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.
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. One of the keys in accurate pachymetry is...
suspected acquired color defect
more males than females
decrease in vision due to glare conditions
holding the probe perpendicular to the corneal surface

2. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
both eyes equally
more males than females
white to white corneal diameter

3. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
refractive error
to have little or no shadow
central corneal thickness

4. Color vision defects in children are frequently detected among those with...
one-fourth
reading disabilities
holding the probe perpendicular to the corneal surface
refractive surgery

5. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
2.0 or more
differentiate between congenital or acquired color blindness
normal tearing
3.0 D

6. Color vision testing is used to detect all of the following except...
ultrasound
remove the instrument from use
refractive error
differentiate between congenital or acquired color blindness

7. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
varies according to the type of test
one-fourth
dacryocystitis

8. When performing a brightness acuity glare test - it is best to do which of the following?
dacryocystitis
patient wearing spectacles
Allow the patient to adjust to the light level before reading the letters.
central corneal thickness

9. Acquired color vision defects...
central corneal thickness
can often be cured if the causative factor is eliminated
20
having them trace the number/figure

10. In which of the following would glare testing be most appropriate?
red - green - and blue
posterior subcapsular cataract
5 minutes
for screening purposes - such as job applications

11. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
reflex tears
pressing on the globe too hard with the probe
before starting school
patient wearing spectacles

12. The axial length of an average adult eye is...
a narrow angle and bowed iris cast a shadow on the iris
a staining agent
are based on the same general equation
23 to 24 mm

13. The IOLMaster evaluates each of the following except...
the defect tends to remain stable over time
varies according to the type of test administered
corneal endothelial drop-out
refractive error

14. The ideal IOLMaster axial length graph is...
dacryocystitis
a tall - central spike with only one peak and smaller spikes on either site
the defect tends to remain stable over time
refractive surgery

15. Glare testing is used to identify...
20
blink
0.3 mm
decrease in vision due to glare conditions

16. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
central corneal thickness
can often be cured if the causative factor is eliminated
the defect tends to remain stable over time

17. The Ishihara color plates are useful...
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test administered
the cobalt blue filter
for screening purposes - such as job applications

18. Which eye structure is responsible for color vision?
that the sound beam is directed to the optic disc and the measurement is incorrect
posterior subcapsular cataract
2 to 3 seconds
rods

19. _______ are not used in evaluating tear break-up time (TBUT)
varies according to the type of test
central corneal thickness
varies according to the type of test administered
tear filter papers

20. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
pressing on the globe too hard with the probe
reflex tears
both eyes equally
shine the light flatly from the side - in the plane of the iris

21. A rose bengal does not require the use of...
the cobalt blue filter
'test eye'
shine the light flatly from the side - in the plane of the iris
3.0 D

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

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23. Pachymetry readings are routinely taken prior to...
refractive surgery
are based on the same general equation
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green

24. 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
are based on the same general equation
23 to 24 mm
5 minutes

25. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
23 to 24 mm
central corneal thickness
more males than females

26. Laser interferometry uses which type of laser light?
infrared
shortened axial length due to compression
narrow beam
3.0 D

27. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
posterior subcapsular cataract
red - green - and blue
tear filter papers

28. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
a malingerer may invent a number - thus identifying him- or herself
more males than females
rods

29. Almost all of the formulas for calculating IOL power...
reading disabilities
both eyes equally
IOL power
are based on the same general equation

30. When performing pachymetry prior to refractive surgery - it is generally best to begin...
central corneal thickness
patients who have had corneal refractive surgery
with the central cornea
red - green - and blue

31. 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?
2.0 or more
0.3 mm
varies according to the type of test
severe dry eye

32. Just prior to the beginning of the TBUT test - the patient is instructed to...
more males than females
central corneal thickness
blink
corneal endothelial drop-out

33. With the 1OLMaster - the ideal signal-to-noise ratio is...
a staining agent
normal tearing
is acceptable
2.0 or more

34. Illumination for the color plates test...
infrared
having them trace the number/figure
varies according to the type of test administered
A Schirmer's test of 10 mm or more is considered normal.

35. When calculating intraocular lens (IOL) powers - one must enter...
rods
infrared
desired postoperative refraction
central corneal thickness

36. Schirmer's test I is used to measure...
the patient is shown a sample that is discernable to normal and abnormal alike
shine the light flatly from the side - in the plane of the iris
reflex tears
narrow beam

37. 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?
2 to 3 seconds
5 minutes
more males than females
one-fourth

38. Hereditary color vision defects usually affect...
suspected acquired color defect
to the left of the scleral and orbital echoes
10 seconds
both eyes equally

39. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
infrared
red-green
decrease in vision due to glare conditions

40. The IOLMaster eliminates which of the following sources of error?
decrease in vision due to glare conditions
23 to 24 mm
shortened axial length due to compression
refractive surgery

41. It is important to estimate the anterior chamber depth prior to dilation because...
is acceptable
narrow angles may precipitate an angle-closure glaucoma attack
having them trace the number/figure
one-fourth

42. The axial length of the eye is important in the calculation of...
10 seconds
a malingerer may invent a number - thus identifying him- or herself
IOL power
the defect tends to remain stable over time

43. 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...
posterior subcapsular cataract
that the sound beam is directed to the optic disc and the measurement is incorrect
corneal endothelial drop-out
can often be cured if the causative factor is eliminated

44. Hereditary color defects most often fall into which category?
red-green
expensive equipment
narrow beam
red - green - and blue

45. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
blink
IOL power
infrared

46. Schirmer's test II is used to measure...
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack
for screening purposes - such as job applications
normal tearing

47. An A-Sean can he artificially shortened due to...
the cobalt blue filter
pressing on the globe too hard with the probe
severe dry eye
holding the probe perpendicular to the corneal surface

48. Schirmer's test does not require _____ except Test strips
to the left of the scleral and orbital echoes
ultrasound
expensive equipment
dacryocystitis

49. When should a child have his or her color vision checked?
differentiate between congenital or acquired color blindness
before starting school
refractive error
desired postoperative refraction

50. In evaluating an axial length scan - the retinal echo must be...
Allow the patient to adjust to the light level before reading the letters.
to the left of the scleral and orbital echoes
white to white corneal diameter
is acceptable

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Certified Ophthalmic Assistant

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