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Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
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. _______ are not used in evaluating tear break-up time (TBUT)
10 seconds
tear filter papers
severe dry eye
a narrow angle and bowed iris cast a shadow on the iris

2. If a biometry instrument fails to calibrate properly - one should...
blink
the use of an anesthetic
remove the instrument from use
refractive error

3. Hereditary color vision defects affect...
reflex tears
the appearance of dry spots
more males than females
rods

4. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
IOL power
0.3 mm
the appearance of dry spots

5. Glare testing is used to identify...
both eyes equally
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect
dacryocystitis

6. When performing pachymetry prior to refractive surgery - it is generally best to begin...
Allow the patient to adjust to the light level before reading the letters.
shortened axial length due to compression
patients who have had corneal refractive surgery
with the central cornea

7. Illumination for the color plates test...
A Schirmer's test of 10 mm or more is considered normal.
varies according to the type of test administered
tear filter papers
differentiate between congenital or acquired color blindness

8. Schirmer's test does not require _____ except Test strips
decrease in vision due to glare conditions
patients who have had corneal refractive surgery
red - green - and blue
expensive equipment

9. One of the keys in accurate pachymetry is...
decrease in vision due to glare conditions
differentiate between congenital or acquired color blindness
545 pm
holding the probe perpendicular to the corneal surface

10. When should a child have his or her color vision checked?
before starting school
blink
reflex tears
having them trace the number/figure

11. Almost all of the formulas for calculating IOL power...
the cobalt blue filter
3.0 D
are based on the same general equation
normal tearing

12. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
varies according to the type of test administered
patient wearing spectacles
the defect tends to remain stable over time

13. The IOLMaster must be calibrated daily using a...
differentiate between congenital or acquired color blindness
to have little or no shadow
'test eye'
refractive error

14. The photosensitive pigments of the eye are sensitive to...
IOL power
red - green - and blue
refractive surgery
having them trace the number/figure

15. Laser interferometry uses which type of laser light?
infrared
severe dry eye
red-green
patients who have had corneal refractive surgery

16. The axial length of an average adult eye is...
having them trace the number/figure
shine the light flatly from the side - in the plane of the iris
23 to 24 mm
more males than females

17. It is important to estimate the anterior chamber depth prior to dilation because...
narrow beam
narrow angles may precipitate an angle-closure glaucoma attack
a staining agent
red - green - and blue

18. In test a patient with the color pseudoisochromatic plates...
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing
are based on the same general equation
the patient should be tested with near correction - if worn

19. Pachymetry readings are routinely taken prior to...
narrow angles may precipitate an angle-closure glaucoma attack
refractive surgery
severe dry eye
3.0 D

20. Which of the following should be color-vision tested one eye at a time?
having them trace the number/figure
suspected acquired color defect
both eyes equally
red-green

21. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
the cobalt blue filter
3.0 D
having them trace the number/figure
patient wearing spectacles

22. Hereditary color vision defects usually affect...
both eyes equally
suspected acquired color defect
patient wearing spectacles
decrease in vision due to glare conditions

23. The axial length of the eye is important in the calculation of...
IOL power
a staining agent
corneal endothelial drop-out
a tall - central spike with only one peak and smaller spikes on either site

24. Color vision defects in children are frequently detected among those with...
reading disabilities
to the left of the scleral and orbital echoes
the defect tends to remain stable over time
the patient should be tested with near correction - if worn

25. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
infrared
red - green - and blue
ultrasound

26. An A-Sean can he artificially shortened due to...
corneal endothelial drop-out
'test eye'
one-fourth
pressing on the globe too hard with the probe

27. When using a penlight to estimate anterior chamber depth - an open angle would appear...
suspected acquired color defect
blink
3.0 D
to have little or no shadow

28. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
dacryocystitis
refractive surgery
20
the patient is shown a sample that is discernable to normal and abnormal alike

29. Measuring corneal thickness via nonoptical pachymetry involves the use of...
holding the probe perpendicular to the corneal surface
desired postoperative refraction
ultrasound
varies according to the type of test

30. 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
A-constant
varies according to the type of test
patients who have had corneal refractive surgery

31. When using color plates - a score indicates abnormal color vision...
differentiate between congenital or acquired color blindness
the defect tends to remain stable over time
are based on the same general equation
varies according to the type of test

32. A patient with which of the following potential diagnoses would be tested with bengal?
patient wearing spectacles
the defect tends to remain stable over time
severe dry eye
A-constant

33. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
IOL power
the defect tends to remain stable over time
for screening purposes - such as job applications

34. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
2.0 or more
differentiate between congenital or acquired color blindness
is acceptable
one-fourth

35. Young children can be tested using the color plates by...
the use of an anesthetic
5 minutes
are based on the same general equation
having them trace the number/figure

36. Estimating the anterior chamber depth with a penlight works because...
10 seconds
the cobalt blue filter
red-green
a narrow angle and bowed iris cast a shadow on the iris

37. When calculating IOL power - each of the following are necessary except...
normal tearing
white to white corneal diameter
shortened axial length due to compression
can often be cured if the causative factor is eliminated

38. Color vision testing is used to detect all of the following except...
varies according to the type of test
desired postoperative refraction
reading disabilities
differentiate between congenital or acquired color blindness

39. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
2 to 3 seconds
0.3 mm
corneal endothelial drop-out

40. Schirmer's test II is used to measure...
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
normal tearing
expensive equipment

41. A rose bengal does not require the use of...
the defect tends to remain stable over time
the cobalt blue filter
23 to 24 mm
shine the light flatly from the side - in the plane of the iris

42. Which eye structure is responsible for color vision?
reading disabilities
rods
tear filter papers
decrease in vision due to glare conditions

43. Measuring time for the Schirmer's test is...
2 to 3 seconds
5 minutes
shine the light flatly from the side - in the plane of the iris
refractive error

44. Acquired color vision defects...
a narrow angle and bowed iris cast a shadow on the iris
can often be cured if the causative factor is eliminated
a staining agent
to have little or no shadow

45. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
white to white corneal diameter
patients who have had corneal refractive surgery
red - green - and blue
shortened axial length due to compression

46. The type of pachymetry used to evaluate a glaucoma suspect is...
20
suspected acquired color defect
central corneal thickness
to have little or no shadow

47. The average central thickness of the human cornea is...
the patient should be tested with near correction - if worn
blink
to the left of the scleral and orbital echoes
545 pm

48. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
focus can he moved off-axis to obtain a clear reading
blink
reflex tears

49. The difference between Schirmer's test I and II is...
rods
the use of an anesthetic
the cobalt blue filter
shortened axial length due to compression

50. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
normal tearing
ultrasound
a malingerer may invent a number - thus identifying him- or herself

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Certified Ophthalmic Assistant

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