Test your basic knowledge |

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. Color vision defects in children are frequently detected among those with...
reading disabilities
2 to 3 seconds
focus can he moved off-axis to obtain a clear reading
10 seconds

2. Almost all of the formulas for calculating IOL power...
to have little or no shadow
10 seconds
are based on the same general equation
more males than females

3. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
pressing on the globe too hard with the probe
5 minutes
the defect tends to remain stable over time
for screening purposes - such as job applications

4. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
pressing on the globe too hard with the probe
white to white corneal diameter
'test eye'

5. When using a penlight to estimate anterior chamber depth - an open angle would appear...
narrow beam
varies according to the type of test
to have little or no shadow
5 minutes

6. The photosensitive pigments of the eye are sensitive to...
to the left of the scleral and orbital echoes
2.0 or more
shine the light flatly from the side - in the plane of the iris
red - green - and blue

7. Which eye structure is responsible for color vision?
the use of an anesthetic
a staining agent
having them trace the number/figure
rods

8. 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?
severe dry eye
one-fourth
is acceptable
pressing on the globe too hard with the probe

9. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
rods
patient wearing spectacles
a malingerer may invent a number - thus identifying him- or herself
to have little or no shadow

10. A patient with which of the following potential diagnoses would be tested with bengal?
desired postoperative refraction
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye
suspected acquired color defect

11. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
white to white corneal diameter
3.0 D
having them trace the number/figure
rods

12. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
rods
refractive error
decrease in vision due to glare conditions

13. When should a child have his or her color vision checked?
one-fourth
Allow the patient to adjust to the light level before reading the letters.
shortened axial length due to compression
before starting school

14. Color vision testing is used to detect all of the following except...
severe dry eye
differentiate between congenital or acquired color blindness
that the sound beam is directed to the optic disc and the measurement is incorrect
the cobalt blue filter

15. Laser interferometry uses which type of laser light?
the appearance of dry spots
infrared
one-fourth
0.3 mm

16. When calculating IOL power - each of the following are necessary except...
a tall - central spike with only one peak and smaller spikes on either site
rods
white to white corneal diameter
posterior subcapsular cataract

17. The axial length of the eye is important in the calculation of...
IOL power
3.0 D
reading disabilities
white to white corneal diameter

18. Glare testing is used to identify...
normal tearing
before starting school
decrease in vision due to glare conditions
reflex tears

19. The difference between Schirmer's test I and II is...
posterior subcapsular cataract
the use of an anesthetic
the patient is shown a sample that is discernable to normal and abnormal alike
corneal endothelial drop-out

20. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
that the sound beam is directed to the optic disc and the measurement is incorrect
10 seconds
blink

21. A rose bengal does not require the use of...
is acceptable
dacryocystitis
the cobalt blue filter
more males than females

22. Schirmer's test II is used to measure...
for screening purposes - such as job applications
normal tearing
desired postoperative refraction
varies according to the type of test

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

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24. Pachymetry readings are routinely taken prior to...
23 to 24 mm
for screening purposes - such as job applications
refractive surgery
white to white corneal diameter

25. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
more males than females
red - green - and blue
desired postoperative refraction

26. When positioning the IOLMaster for the axial length reading...
to the left of the scleral and orbital echoes
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
shine the light flatly from the side - in the plane of the iris

27. Illumination for the color plates test...
varies according to the type of test administered
a narrow angle and bowed iris cast a shadow on the iris
pressing on the globe too hard with the probe
2.0 or more

28. 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
Allow the patient to adjust to the light level before reading the letters.
is acceptable
one-fourth

29. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
are based on the same general equation
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness

30. Measuring corneal thickness via nonoptical pachymetry involves the use of...
to the left of the scleral and orbital echoes
ultrasound
severe dry eye
5 minutes

31. The ideal IOLMaster axial length graph is...
varies according to the type of test
tear filter papers
a tall - central spike with only one peak and smaller spikes on either site
10 seconds

32. When performing the TBUT test - the observer is looking for...
before starting school
the appearance of dry spots
3.0 D
remove the instrument from use

33. The axial length of an average adult eye is...
the cobalt blue filter
23 to 24 mm
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable

34. In which of the following would glare testing be most appropriate?
red-green
varies according to the type of test
blink
posterior subcapsular cataract

35. When performing a brightness acuity glare test - it is best to do which of the following?
the patient should be tested with near correction - if worn
Allow the patient to adjust to the light level before reading the letters.
suspected acquired color defect
5 minutes

36. Hereditary color vision defects affect...
IOL power
narrow beam
more males than females
is acceptable

37. _______ are not used in evaluating tear break-up time (TBUT)
before starting school
tear filter papers
23 to 24 mm
rods

38. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
more males than females
suspected acquired color defect
both eyes equally

39. The IOLMaster eliminates which of the following sources of error?
reflex tears
infrared
shortened axial length due to compression
the appearance of dry spots

40. The Schirmer's test might be indicated in all of the following except...
shortened axial length due to compression
narrow beam
varies according to the type of test
dacryocystitis

41. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
shortened axial length due to compression
'test eye'
expensive equipment

42. Schirmer's test I is used to measure...
reflex tears
a narrow angle and bowed iris cast a shadow on the iris
blink
severe dry eye

43. Acquired color vision defects...
3.0 D
are based on the same general equation
can often be cured if the causative factor is eliminated
reflex tears

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

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45. 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?
for screening purposes - such as job applications
0.3 mm
is acceptable
Allow the patient to adjust to the light level before reading the letters.

46. Schirmer's test does not require _____ except Test strips
holding the probe perpendicular to the corneal surface
3.0 D
is acceptable
expensive equipment

47. With the 1OLMaster - the ideal signal-to-noise ratio is...
refractive error
2.0 or more
narrow beam
patients who have had corneal refractive surgery

48. Rose bengal is...
a staining agent
with the central cornea
the use of an anesthetic
red - green - and blue

49. Measuring time for the Schirmer's test is...
5 minutes
infrared
are based on the same general equation
expensive equipment

50. It is important to estimate the anterior chamber depth prior to dilation because...
IOL power
narrow angles may precipitate an angle-closure glaucoma attack
more males than females
2.0 or more