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. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
narrow beam
3.0 D
varies according to the type of test administered
for screening purposes - such as job applications

2. Pachymetry readings are routinely taken prior to...
red - green - and blue
ultrasound
refractive surgery
red-green

3. 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...
the patient should be tested with near correction - if worn
more males than females
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect

4. When calculating IOL power - each of the following are necessary except...
pressing on the globe too hard with the probe
white to white corneal diameter
20
shortened axial length due to compression

5. If a biometry instrument fails to calibrate properly - one should...
red-green
normal tearing
infrared
remove the instrument from use

6. Illumination for the color plates test...
white to white corneal diameter
varies according to the type of test administered
normal tearing
refractive surgery

7. The ideal IOLMaster axial length graph is...
posterior subcapsular cataract
refractive error
suspected acquired color defect
a tall - central spike with only one peak and smaller spikes on either site

8. When should a child have his or her color vision checked?
a malingerer may invent a number - thus identifying him- or herself
before starting school
both eyes equally
tear filter papers

9. Which eye structure is responsible for color vision?
corneal endothelial drop-out
rods
23 to 24 mm
tear filter papers

10. Schirmer's test II is used to measure...
normal tearing
'test eye'
infrared
decrease in vision due to glare conditions

11. When performing pachymetry prior to refractive surgery - it is generally best to begin...
one-fourth
reading disabilities
with the central cornea
narrow beam

12. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
both eyes equally
narrow beam
5 minutes
is acceptable

13. This is not evaluated using rose Bengal except...
10 seconds
central corneal thickness
the patient should be tested with near correction - if worn
corneal endothelial drop-out

14. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
refractive error
2.0 or more
the defect tends to remain stable over time
having them trace the number/figure

15. When using a penlight to estimate anterior chamber depth - an open angle would appear...
shine the light flatly from the side - in the plane of the iris
the cobalt blue filter
the defect tends to remain stable over time
to have little or no shadow

16. Color vision testing is used to detect all of the following except...
to the left of the scleral and orbital echoes
infrared
differentiate between congenital or acquired color blindness
is acceptable

17. When performing a brightness acuity glare test - it is best to do which of the following?
20
desired postoperative refraction
blink
Allow the patient to adjust to the light level before reading the letters.

18. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
differentiate between congenital or acquired color blindness
is acceptable
are based on the same general equation
central corneal thickness

19. The Ishihara color plates are useful...
for screening purposes - such as job applications
can often be cured if the causative factor is eliminated
the use of an anesthetic
decrease in vision due to glare conditions

20. When calculating intraocular lens (IOL) powers - one must enter...
Allow the patient to adjust to the light level before reading the letters.
0.3 mm
desired postoperative refraction
both eyes equally

21. The IOLMaster eliminates which of the following sources of error?
reflex tears
2.0 or more
the patient should be tested with near correction - if worn
shortened axial length due to compression

22. Glare testing is used to identify...
3.0 D
decrease in vision due to glare conditions
posterior subcapsular cataract
for screening purposes - such as job applications

23. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
severe dry eye
IOL power
for screening purposes - such as job applications

24. Hereditary color vision defects affect...
blink
more males than females
23 to 24 mm
suspected acquired color defect

25. Acquired color vision defects...
'test eye'
varies according to the type of test administered
545 pm
can often be cured if the causative factor is eliminated

26. Hereditary color vision defects usually affect...
both eyes equally
one-fourth
decrease in vision due to glare conditions
to have little or no shadow

27. Schirmer's test I is used to measure...
to the left of the scleral and orbital echoes
reflex tears
3.0 D
a malingerer may invent a number - thus identifying him- or herself

28. Measuring time for the Schirmer's test is...
refractive error
narrow angles may precipitate an angle-closure glaucoma attack
5 minutes
pressing on the globe too hard with the probe

29. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
reflex tears
for screening purposes - such as job applications
holding the probe perpendicular to the corneal surface

30. Measuring corneal thickness via nonoptical pachymetry involves the use of...
varies according to the type of test administered
2 to 3 seconds
a tall - central spike with only one peak and smaller spikes on either site
ultrasound

31. Laser interferometry uses which type of laser light?
5 minutes
decrease in vision due to glare conditions
infrared
a malingerer may invent a number - thus identifying him- or herself

32. The IOLMaster evaluates each of the following except...
tear filter papers
refractive error
posterior subcapsular cataract
5 minutes

33. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
the use of an anesthetic
the defect tends to remain stable over time
A Schirmer's test of 10 mm or more is considered normal.

34. A color plate that shows no obvious number to normal and abnormal alike is useful because...
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself
3.0 D
before starting school

35. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
a tall - central spike with only one peak and smaller spikes on either site
is acceptable
holding the probe perpendicular to the corneal surface

36. 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
2.0 or more
one-fourth

37. Hereditary color defects most often fall into which category?
with the central cornea
red-green
'test eye'
both eyes equally

38. When positioning the IOLMaster for the axial length reading...
central corneal thickness
the appearance of dry spots
patients who have had corneal refractive surgery
focus can he moved off-axis to obtain a clear reading

39. Estimating the anterior chamber depth with a penlight works because...
5 minutes
a narrow angle and bowed iris cast a shadow on the iris
corneal endothelial drop-out
desired postoperative refraction

40. Almost all of the formulas for calculating IOL power...
A Schirmer's test of 10 mm or more is considered normal.
with the central cornea
are based on the same general equation
5 minutes

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

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42. A TBUT of which of the following would indicate tear film dysfunction?
varies according to the type of test
10 seconds
ultrasound
shine the light flatly from the side - in the plane of the iris

43. How long should the patient be given to recognize the figure in a color plate?
rods
the defect tends to remain stable over time
2 to 3 seconds
A Schirmer's test of 10 mm or more is considered normal.

44. An A-Sean can he artificially shortened due to...
patient wearing spectacles
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site
one-fourth

45. Rose bengal is...
differentiate between congenital or acquired color blindness
shine the light flatly from the side - in the plane of the iris
a staining agent
are based on the same general equation

46. The difference between Schirmer's test I and II is...
to the left of the scleral and orbital echoes
more males than females
rods
the use of an anesthetic

47. One of the keys in accurate pachymetry is...
patient wearing spectacles
holding the probe perpendicular to the corneal surface
5 minutes
more males than females

48. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
ultrasound
tear filter papers
severe dry eye

49. The type of pachymetry used to evaluate a glaucoma suspect is...
blink
central corneal thickness
3.0 D
white to white corneal diameter

50. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
3.0 D
a tall - central spike with only one peak and smaller spikes on either site
the defect tends to remain stable over time
shine the light flatly from the side - in the plane of the iris