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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. Hereditary color vision defects usually affect...
both eyes equally
focus can he moved off-axis to obtain a clear reading
one-fourth
dacryocystitis

2. Hereditary color defects most often fall into which category?
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
red-green
the patient should be tested with near correction - if worn

3. The Ishihara color plates are useful...
for screening purposes - such as job applications
refractive surgery
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

4. Laser interferometry uses which type of laser light?
for screening purposes - such as job applications
shine the light flatly from the side - in the plane of the iris
infrared
3.0 D

5. 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...
both eyes equally
expensive equipment
red - green - and blue
that the sound beam is directed to the optic disc and the measurement is incorrect

6. Pachymetry readings are routinely taken prior to...
narrow angles may precipitate an angle-closure glaucoma attack
one-fourth
refractive surgery
10 seconds

7. Acquired color vision defects...
can often be cured if the causative factor is eliminated
2 to 3 seconds
5 minutes
posterior subcapsular cataract

8. When positioning the IOLMaster for the axial length reading...
that the sound beam is directed to the optic disc and the measurement is incorrect
having them trace the number/figure
focus can he moved off-axis to obtain a clear reading
tear filter papers

9. Estimating the anterior chamber depth with a penlight works because...
'test eye'
a narrow angle and bowed iris cast a shadow on the iris
refractive surgery
to the left of the scleral and orbital echoes

10. A TBUT of which of the following would indicate tear film dysfunction?
red - green - and blue
23 to 24 mm
10 seconds
patient wearing spectacles

11. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
to have little or no shadow
the defect tends to remain stable over time
remove the instrument from use
both eyes equally

12. Schirmer's test I is used to measure...
the appearance of dry spots
that the sound beam is directed to the optic disc and the measurement is incorrect
for screening purposes - such as job applications
reflex tears

13. The IOLMaster evaluates each of the following except...
refractive surgery
decrease in vision due to glare conditions
shortened axial length due to compression
refractive error

14. Hereditary color vision defects affect...
varies according to the type of test
differentiate between congenital or acquired color blindness
both eyes equally
more males than females

15. When using a penlight to estimate anterior chamber depth - an open angle would appear...
central corneal thickness
3.0 D
one-fourth
to have little or no shadow

16. An A-Sean can he artificially shortened due to...
ultrasound
blink
pressing on the globe too hard with the probe
red - green - and blue

17. The axial length of an average adult eye is...
central corneal thickness
desired postoperative refraction
focus can he moved off-axis to obtain a clear reading
23 to 24 mm

18. Rose bengal is...
to have little or no shadow
refractive error
a staining agent
reading disabilities

19. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
the appearance of dry spots
blink
tear filter papers

20. 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)...
blink
with the central cornea
dacryocystitis
A-constant

21. When performing a brightness acuity glare test - it is best to do which of the following?
Allow the patient to adjust to the light level before reading the letters.
reflex tears
a narrow angle and bowed iris cast a shadow on the iris
focus can he moved off-axis to obtain a clear reading

22. When calculating intraocular lens (IOL) powers - one must enter...
for screening purposes - such as job applications
the cobalt blue filter
desired postoperative refraction
dacryocystitis

23. The axial length of the eye is important in the calculation of...
2 to 3 seconds
IOL power
holding the probe perpendicular to the corneal surface
0.3 mm

24. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
varies according to the type of test administered
Allow the patient to adjust to the light level before reading the letters.
is acceptable
patients who have had corneal refractive surgery

25. In which of the following would glare testing be most appropriate?
pressing on the globe too hard with the probe
shortened axial length due to compression
posterior subcapsular cataract
reflex tears

26. With the 1OLMaster - the ideal signal-to-noise ratio is...
the use of an anesthetic
2.0 or more
3.0 D
a malingerer may invent a number - thus identifying him- or herself

27. A color plate that shows no obvious number to normal and abnormal alike is useful because...
varies according to the type of test administered
red - green - and blue
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself

28. Which eye structure is responsible for color vision?
rods
10 seconds
having them trace the number/figure
varies according to the type of test administered

29. Measuring time for the Schirmer's test is...
5 minutes
10 seconds
one-fourth
20

30. The average central thickness of the human cornea is...
shine the light flatly from the side - in the plane of the iris
corneal endothelial drop-out
the patient is shown a sample that is discernable to normal and abnormal alike
545 pm

31. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
pressing on the globe too hard with the probe
rods
patients who have had corneal refractive surgery
to have little or no shadow

32. Which of the following should be color-vision tested one eye at a time?
narrow beam
red - green - and blue
suspected acquired color defect
Allow the patient to adjust to the light level before reading the letters.

33. The IOLMaster eliminates which of the following sources of error?
10 seconds
shortened axial length due to compression
for screening purposes - such as job applications
a staining agent

34. Glare testing is used to identify...
one-fourth
red - green - and blue
decrease in vision due to glare conditions
the use of an anesthetic

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

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36. Schirmer's test does not require _____ except Test strips
is acceptable
blink
A-constant
expensive equipment

37. When performing the TBUT test - the observer is looking for...
severe dry eye
differentiate between congenital or acquired color blindness
the appearance of dry spots
Allow the patient to adjust to the light level before reading the letters.

38. 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?
a staining agent
tear filter papers
A Schirmer's test of 10 mm or more is considered normal.
one-fourth

39. Illumination for the color plates test...
varies according to the type of test
a staining agent
varies according to the type of test administered
posterior subcapsular cataract

40. Before proceeding with the actual color plate test...
severe dry eye
white to white corneal diameter
the patient is shown a sample that is discernable to normal and abnormal alike
patient wearing spectacles

41. When using color plates - a score indicates abnormal color vision...
desired postoperative refraction
'test eye'
refractive error
varies according to the type of test

42. Color vision defects in children are frequently detected among those with...
differentiate between congenital or acquired color blindness
posterior subcapsular cataract
reading disabilities
0.3 mm

43. When should a child have his or her color vision checked?
A-constant
tear filter papers
blink
before starting school

44. Almost all of the formulas for calculating IOL power...
2.0 or more
are based on the same general equation
2 to 3 seconds
severe dry eye

45. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
shine the light flatly from the side - in the plane of the iris
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test
20

46. Young children can be tested using the color plates by...
A-constant
5 minutes
having them trace the number/figure
reading disabilities

47. 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?
'test eye'
0.3 mm
a staining agent
having them trace the number/figure

48. A patient with which of the following potential diagnoses would be tested with bengal?
shine the light flatly from the side - in the plane of the iris
before starting school
severe dry eye
10 seconds

49. The difference between Schirmer's test I and II is...
the use of an anesthetic
the defect tends to remain stable over time
3.0 D
having them trace the number/figure

50. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
reading disabilities
with the central cornea
narrow beam
the patient should be tested with near correction - if worn

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Certified Ophthalmic Assistant

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