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 ideal IOLMaster axial length graph is...
remove the instrument from use
red - green - and blue
a tall - central spike with only one peak and smaller spikes on either site
both eyes equally

2. The Ishihara color plates are useful...
for screening purposes - such as job applications
10 seconds
infrared
refractive error

3. Schirmer's test I is used to measure...
both eyes equally
reading disabilities
the patient is shown a sample that is discernable to normal and abnormal alike
reflex tears

4. It is important to estimate the anterior chamber depth prior to dilation because...
suspected acquired color defect
remove the instrument from use
is acceptable
narrow angles may precipitate an angle-closure glaucoma attack

5. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site
one-fourth
patient wearing spectacles

6. When should a child have his or her color vision checked?
white to white corneal diameter
before starting school
patients who have had corneal refractive surgery
decrease in vision due to glare conditions

7. Hereditary color vision defects affect...
more males than females
remove the instrument from use
reflex tears
pressing on the globe too hard with the probe

8. The difference between Schirmer's test I and II is...
red-green
focus can he moved off-axis to obtain a clear reading
both eyes equally
the use of an anesthetic

9. Acquired color vision defects...
desired postoperative refraction
can often be cured if the causative factor is eliminated
differentiate between congenital or acquired color blindness
corneal endothelial drop-out

10. 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?
varies according to the type of test
decrease in vision due to glare conditions
central corneal thickness
0.3 mm

11. This is not evaluated using rose Bengal except...
'test eye'
corneal endothelial drop-out
before starting school
2.0 or more

12. Before proceeding with the actual color plate test...
refractive error
decrease in vision due to glare conditions
Allow the patient to adjust to the light level before reading the letters.
the patient is shown a sample that is discernable to normal and abnormal alike

13. Which eye structure is responsible for color vision?
reading disabilities
rods
for screening purposes - such as job applications
the patient is shown a sample that is discernable to normal and abnormal alike

14. Schirmer's test does not require _____ except Test strips
white to white corneal diameter
2 to 3 seconds
expensive equipment
Allow the patient to adjust to the light level before reading the letters.

15. Glare testing is used to identify...
decrease in vision due to glare conditions
suspected acquired color defect
the patient should be tested with near correction - if worn
pressing on the globe too hard with the probe

16. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
white to white corneal diameter
2.0 or more
remove the instrument from use

17. Rose bengal is...
dacryocystitis
23 to 24 mm
having them trace the number/figure
a staining agent

18. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
a staining agent
is acceptable
shortened axial length due to compression
ultrasound

19. In which of the following would glare testing be most appropriate?
can often be cured if the causative factor is eliminated
posterior subcapsular cataract
remove the instrument from use
narrow beam

20. The IOLMaster eliminates which of the following sources of error?
10 seconds
central corneal thickness
shortened axial length due to compression
decrease in vision due to glare conditions

21. When positioning the IOLMaster for the axial length reading...
decrease in vision due to glare conditions
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
the appearance of dry spots

22. A rose bengal does not require the use of...
20
'test eye'
that the sound beam is directed to the optic disc and the measurement is incorrect
the cobalt blue filter

23. The axial length of the eye is important in the calculation of...
reading disabilities
IOL power
decrease in vision due to glare conditions
a malingerer may invent a number - thus identifying him- or herself

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

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25. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
central corneal thickness
blink
with the central cornea

26. When calculating IOL power - each of the following are necessary except...
2.0 or more
white to white corneal diameter
one-fourth
A-constant

27. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
before starting school
can often be cured if the causative factor is eliminated
having them trace the number/figure

28. Illumination for the color plates test...
'test eye'
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test administered
2.0 or more

29. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
a staining agent
blink
desired postoperative refraction
20

30. 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?
reflex tears
a malingerer may invent a number - thus identifying him- or herself
one-fourth
desired postoperative refraction

31. The axial length of an average adult eye is...
10 seconds
decrease in vision due to glare conditions
23 to 24 mm
a staining agent

32. Laser interferometry uses which type of laser light?
IOL power
infrared
having them trace the number/figure
0.3 mm

33. Measuring time for the Schirmer's test is...
to have little or no shadow
refractive error
5 minutes
A-constant

34. Pachymetry readings are routinely taken prior to...
refractive surgery
10 seconds
a tall - central spike with only one peak and smaller spikes on either site
ultrasound

35. 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...
reflex tears
narrow angles may precipitate an angle-closure glaucoma attack
that the sound beam is directed to the optic disc and the measurement is incorrect
white to white corneal diameter

36. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
'test eye'
a malingerer may invent a number - thus identifying him- or herself
normal tearing
the defect tends to remain stable over time

37. One of the keys in accurate pachymetry is...
refractive surgery
holding the probe perpendicular to the corneal surface
varies according to the type of test
3.0 D

38. In evaluating an axial length scan - the retinal echo must be...
varies according to the type of test administered
a malingerer may invent a number - thus identifying him- or herself
the appearance of dry spots
to the left of the scleral and orbital echoes

39. If a biometry instrument fails to calibrate properly - one should...
a narrow angle and bowed iris cast a shadow on the iris
remove the instrument from use
patient wearing spectacles
desired postoperative refraction

40. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
that the sound beam is directed to the optic disc and the measurement is incorrect
infrared
for screening purposes - such as job applications

41. Hereditary color defects most often fall into which category?
A Schirmer's test of 10 mm or more is considered normal.
normal tearing
infrared
red-green

42. When using color plates - a score indicates abnormal color vision...
to have little or no shadow
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test
white to white corneal diameter

43. When calculating intraocular lens (IOL) powers - one must enter...
infrared
white to white corneal diameter
desired postoperative refraction
the use of an anesthetic

44. A TBUT of which of the following would indicate tear film dysfunction?
tear filter papers
with the central cornea
posterior subcapsular cataract
10 seconds

45. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
are based on the same general equation
Allow the patient to adjust to the light level before reading the letters.
545 pm

46. A color plate that shows no obvious number to normal and abnormal alike is useful because...
one-fourth
infrared
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself

47. The photosensitive pigments of the eye are sensitive to...
refractive surgery
suspected acquired color defect
narrow beam
red - green - and blue

48. The IOLMaster evaluates each of the following except...
is acceptable
central corneal thickness
refractive error
10 seconds

49. Measuring corneal thickness via nonoptical pachymetry involves the use of...
the use of an anesthetic
ultrasound
corneal endothelial drop-out
expensive equipment

50. Schirmer's test II is used to measure...
3.0 D
to have little or no shadow
patient wearing spectacles
normal tearing