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. Hereditary color vision defects usually affect...
before starting school
shine the light flatly from the side - in the plane of the iris
both eyes equally
2.0 or more

2. When performing the TBUT test - the observer is looking for...
A-constant
patients who have had corneal refractive surgery
white to white corneal diameter
the appearance of dry spots

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

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4. Glare testing is used to identify...
for screening purposes - such as job applications
decrease in vision due to glare conditions
a staining agent
a malingerer may invent a number - thus identifying him- or herself

5. A TBUT of which of the following would indicate tear film dysfunction?
to the left of the scleral and orbital echoes
blink
red-green
10 seconds

6. If a biometry instrument fails to calibrate properly - one should...
2.0 or more
remove the instrument from use
Allow the patient to adjust to the light level before reading the letters.
holding the probe perpendicular to the corneal surface

7. Schirmer's test does not require _____ except Test strips
varies according to the type of test
the appearance of dry spots
to the left of the scleral and orbital echoes
expensive equipment

8. Hereditary color defects most often fall into which category?
normal tearing
decrease in vision due to glare conditions
reflex tears
red-green

9. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
patients who have had corneal refractive surgery
can often be cured if the causative factor is eliminated
rods

10. The axial length of an average adult eye is...
23 to 24 mm
focus can he moved off-axis to obtain a clear reading
with the central cornea
one-fourth

11. Measuring time for the Schirmer's test is...
refractive surgery
severe dry eye
5 minutes
blink

12. How long should the patient be given to recognize the figure in a color plate?
desired postoperative refraction
red - green - and blue
central corneal thickness
2 to 3 seconds

13. Almost all of the formulas for calculating IOL power...
2.0 or more
pressing on the globe too hard with the probe
are based on the same general equation
the patient is shown a sample that is discernable to normal and abnormal alike

14. Acquired color vision defects...
can often be cured if the causative factor is eliminated
corneal endothelial drop-out
with the central cornea
5 minutes

15. One of the keys in accurate pachymetry is...
ultrasound
holding the probe perpendicular to the corneal surface
reflex tears
to have little or no shadow

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

17. A color plate that shows no obvious number to normal and abnormal alike is useful because...
with the central cornea
desired postoperative refraction
a malingerer may invent a number - thus identifying him- or herself
a narrow angle and bowed iris cast a shadow on the iris

18. Which of the following should be color-vision tested one eye at a time?
white to white corneal diameter
with the central cornea
suspected acquired color defect
both eyes equally

19. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
more males than females
pressing on the globe too hard with the probe
the defect tends to remain stable over time
can often be cured if the causative factor is eliminated

20. Young children can be tested using the color plates by...
refractive error
having them trace the number/figure
10 seconds
a malingerer may invent a number - thus identifying him- or herself

21. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
corneal endothelial drop-out
'test eye'
to the left of the scleral and orbital echoes

22. Hereditary color vision defects affect...
is acceptable
more males than females
blink
infrared

23. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
red - green - and blue
pressing on the globe too hard with the probe
the appearance of dry spots

24. A rose bengal does not require the use of...
0.3 mm
the cobalt blue filter
corneal endothelial drop-out
suspected acquired color defect

25. Just prior to the beginning of the TBUT test - the patient is instructed to...
the use of an anesthetic
blink
a tall - central spike with only one peak and smaller spikes on either site
shine the light flatly from the side - in the plane of the iris

26. The Ishihara color plates are useful...
ultrasound
A Schirmer's test of 10 mm or more is considered normal.
dacryocystitis
for screening purposes - such as job applications

27. In evaluating an axial length scan - the retinal echo must be...
5 minutes
corneal endothelial drop-out
to the left of the scleral and orbital echoes
A Schirmer's test of 10 mm or more is considered normal.

28. The photosensitive pigments of the eye are sensitive to...
posterior subcapsular cataract
red - green - and blue
refractive surgery
0.3 mm

29. Rose bengal is...
a staining agent
the use of an anesthetic
both eyes equally
reflex tears

30. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
varies according to the type of test administered
holding the probe perpendicular to the corneal surface
the use of an anesthetic

31. In which of the following would glare testing be most appropriate?
10 seconds
posterior subcapsular cataract
expensive equipment
are based on the same general equation

32. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
shortened axial length due to compression
23 to 24 mm
normal tearing

33. Measuring corneal thickness via nonoptical pachymetry involves the use of...
is acceptable
more males than females
ultrasound
the defect tends to remain stable over time

34. The difference between Schirmer's test I and II is...
the use of an anesthetic
a staining agent
the patient is shown a sample that is discernable to normal and abnormal alike
shortened axial length due to compression

35. Laser interferometry uses which type of laser light?
a tall - central spike with only one peak and smaller spikes on either site
'test eye'
IOL power
infrared

36. 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
a narrow angle and bowed iris cast a shadow on the iris
corneal endothelial drop-out
white to white corneal diameter

37. Which eye structure is responsible for color vision?
can often be cured if the causative factor is eliminated
that the sound beam is directed to the optic disc and the measurement is incorrect
rods
remove the instrument from use

38. An A-Sean can he artificially shortened due to...
is acceptable
white to white corneal diameter
pressing on the globe too hard with the probe
20

39. The Schirmer's test might be indicated in all of the following except...
refractive error
more males than females
one-fourth
dacryocystitis

40. 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
a tall - central spike with only one peak and smaller spikes on either site
that the sound beam is directed to the optic disc and the measurement is incorrect

41. 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...
3.0 D
that the sound beam is directed to the optic disc and the measurement is incorrect
is acceptable
the patient is shown a sample that is discernable to normal and abnormal alike

42. The type of pachymetry used to evaluate a glaucoma suspect is...
narrow angles may precipitate an angle-closure glaucoma attack
corneal endothelial drop-out
focus can he moved off-axis to obtain a clear reading
central corneal thickness

43. A patient with which of the following potential diagnoses would be tested with bengal?
a staining agent
severe dry eye
decrease in vision due to glare conditions
20

44. Schirmer's test I is used to measure...
reflex tears
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing

45. Schirmer's test II is used to measure...
normal tearing
0.3 mm
23 to 24 mm
decrease in vision due to glare conditions

46. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
A-constant
the patient should be tested with near correction - if worn
one-fourth

47. Color vision defects in children are frequently detected among those with...
focus can he moved off-axis to obtain a clear reading
desired postoperative refraction
to the left of the scleral and orbital echoes
reading disabilities

48. With the 1OLMaster - the ideal signal-to-noise ratio is...
can often be cured if the causative factor is eliminated
2.0 or more
are based on the same general equation
ultrasound

49. 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
a malingerer may invent a number - thus identifying him- or herself
red - green - and blue
patients who have had corneal refractive surgery

50. When should a child have his or her color vision checked?
10 seconds
remove the instrument from use
refractive surgery
before starting school