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. The IOLMaster eliminates which of the following sources of error?
rods
the cobalt blue filter
with the central cornea
shortened axial length due to compression

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

3. A color plate that shows no obvious number to normal and abnormal alike is useful because...
reading disabilities
a malingerer may invent a number - thus identifying him- or herself
the appearance of dry spots
0.3 mm

4. The type of pachymetry used to evaluate a glaucoma suspect is...
blink
central corneal thickness
infrared
3.0 D

5. When positioning the IOLMaster for the axial length reading...
23 to 24 mm
Allow the patient to adjust to the light level before reading the letters.
'test eye'
focus can he moved off-axis to obtain a clear reading

6. In evaluating an axial length scan - the retinal echo must be...
Allow the patient to adjust to the light level before reading the letters.
remove the instrument from use
to the left of the scleral and orbital echoes
expensive equipment

7. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
that the sound beam is directed to the optic disc and the measurement is incorrect
expensive equipment
20
refractive surgery

8. Glare testing is used to identify...
corneal endothelial drop-out
varies according to the type of test
A-constant
decrease in vision due to glare conditions

9. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
20
ultrasound
desired postoperative refraction

10. Pachymetry readings are routinely taken prior to...
expensive equipment
shine the light flatly from the side - in the plane of the iris
refractive surgery
infrared

11. Young children can be tested using the color plates by...
expensive equipment
to the left of the scleral and orbital echoes
having them trace the number/figure
remove the instrument from use

12. Just prior to the beginning of the TBUT test - the patient is instructed to...
varies according to the type of test administered
blink
suspected acquired color defect
both eyes equally

13. The Schirmer's test might be indicated in all of the following except...
ultrasound
a narrow angle and bowed iris cast a shadow on the iris
dacryocystitis
infrared

14. It is important to estimate the anterior chamber depth prior to dilation because...
A Schirmer's test of 10 mm or more is considered normal.
narrow angles may precipitate an angle-closure glaucoma attack
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading

15. Before proceeding with the actual color plate test...
expensive equipment
the patient is shown a sample that is discernable to normal and abnormal alike
before starting school
narrow beam

16. Color vision defects in children are frequently detected among those with...
Allow the patient to adjust to the light level before reading the letters.
reading disabilities
'test eye'
a staining agent

17. If a biometry instrument fails to calibrate properly - one should...
having them trace the number/figure
white to white corneal diameter
blink
remove the instrument from use

18. The IOLMaster evaluates each of the following except...
a tall - central spike with only one peak and smaller spikes on either site
refractive error
a malingerer may invent a number - thus identifying him- or herself
expensive equipment

19. 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.
refractive error
2 to 3 seconds
the use of an anesthetic

20. The axial length of an average adult eye is...
reading disabilities
A-constant
23 to 24 mm
varies according to the type of test administered

21. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
3.0 D
0.3 mm
Allow the patient to adjust to the light level before reading the letters.
the defect tends to remain stable over time

22. When performing pachymetry prior to refractive surgery - it is generally best to begin...
patients who have had corneal refractive surgery
narrow beam
one-fourth
with the central cornea

23. Which eye structure is responsible for color vision?
IOL power
posterior subcapsular cataract
rods
are based on the same general equation

24. Measuring time for the Schirmer's test is...
2 to 3 seconds
20
infrared
5 minutes

25. The difference between Schirmer's test I and II is...
reflex tears
0.3 mm
focus can he moved off-axis to obtain a clear reading
the use of an anesthetic

26. When should a child have his or her color vision checked?
corneal endothelial drop-out
before starting school
'test eye'
the use of an anesthetic

27. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
Allow the patient to adjust to the light level before reading the letters.
varies according to the type of test administered
for screening purposes - such as job applications

28. Laser interferometry uses which type of laser light?
narrow angles may precipitate an angle-closure glaucoma attack
infrared
545 pm
dacryocystitis

29. Illumination for the color plates test...
varies according to the type of test administered
white to white corneal diameter
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots

30. 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?
normal tearing
0.3 mm
IOL power
remove the instrument from use

31. A patient with which of the following potential diagnoses would be tested with bengal?
Allow the patient to adjust to the light level before reading the letters.
severe dry eye
narrow beam
the patient is shown a sample that is discernable to normal and abnormal alike

32. The average central thickness of the human cornea is...
545 pm
refractive error
IOL power
is acceptable

33. Hereditary color vision defects affect...
more males than females
red - green - and blue
decrease in vision due to glare conditions
reflex tears

34. Rose bengal is...
a staining agent
red - green - and blue
reading disabilities
20

35. The ideal IOLMaster axial length graph is...
the patient should be tested with near correction - if worn
suspected acquired color defect
more males than females
a tall - central spike with only one peak and smaller spikes on either site

36. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
shortened axial length due to compression
varies according to the type of test administered
differentiate between congenital or acquired color blindness

37. How long should the patient be given to recognize the figure in a color plate?
shortened axial length due to compression
varies according to the type of test administered
is acceptable
2 to 3 seconds

38. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
suspected acquired color defect
the defect tends to remain stable over time
differentiate between congenital or acquired color blindness
'test eye'

39. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
'test eye'
patients who have had corneal refractive surgery
that the sound beam is directed to the optic disc and the measurement is incorrect
20

40. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
the patient should be tested with near correction - if worn
5 minutes
2.0 or more

41. 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)...
more males than females
suspected acquired color defect
A-constant
are based on the same general equation

42. This is not evaluated using rose Bengal except...
expensive equipment
corneal endothelial drop-out
reading disabilities
shine the light flatly from the side - in the plane of the iris

43. The axial length of the eye is important in the calculation of...
posterior subcapsular cataract
narrow beam
are based on the same general equation
IOL power

44. A TBUT of which of the following would indicate tear film dysfunction?
having them trace the number/figure
10 seconds
severe dry eye
A Schirmer's test of 10 mm or more is considered normal.

45. Which of the following should be color-vision tested one eye at a time?
pressing on the globe too hard with the probe
545 pm
suspected acquired color defect
before starting school

46. Schirmer's test II is used to measure...
dacryocystitis
normal tearing
are based on the same general equation
to the left of the scleral and orbital echoes

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

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48. The Ishihara color plates are useful...
the use of an anesthetic
20
varies according to the type of test administered
for screening purposes - such as job applications

49. Acquired color vision defects...
the defect tends to remain stable over time
A-constant
can often be cured if the causative factor is eliminated
the cobalt blue filter

50. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
can often be cured if the causative factor is eliminated
shine the light flatly from the side - in the plane of the iris
a narrow angle and bowed iris cast a shadow on the iris
are based on the same general equation