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 Ishihara color plates are useful...
shortened axial length due to compression
before starting school
Allow the patient to adjust to the light level before reading the letters.
for screening purposes - such as job applications

2. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
3.0 D
reading disabilities
red - green - and blue

3. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
ultrasound
with the central cornea
the defect tends to remain stable over time
20

4. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
white to white corneal diameter
5 minutes
refractive error

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

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6. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
having them trace the number/figure
infrared
the appearance of dry spots
the defect tends to remain stable over time

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

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8. Illumination for the color plates test...
having them trace the number/figure
545 pm
one-fourth
varies according to the type of test administered

9. How long should the patient be given to recognize the figure in a color plate?
refractive surgery
2 to 3 seconds
IOL power
to have little or no shadow

10. It is important to estimate the anterior chamber depth prior to dilation because...
patients who have had corneal refractive surgery
'test eye'
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack

11. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
reading disabilities
can often be cured if the causative factor is eliminated
3.0 D
focus can he moved off-axis to obtain a clear reading

12. Schirmer's test does not require _____ except Test strips
expensive equipment
differentiate between congenital or acquired color blindness
to the left of the scleral and orbital echoes
tear filter papers

13. The ideal IOLMaster axial length graph is...
posterior subcapsular cataract
A-constant
a tall - central spike with only one peak and smaller spikes on either site
A Schirmer's test of 10 mm or more is considered normal.

14. 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)...
A-constant
infrared
a narrow angle and bowed iris cast a shadow on the iris
the patient is shown a sample that is discernable to normal and abnormal alike

15. Hereditary color vision defects usually affect...
both eyes equally
red - green - and blue
infrared
narrow angles may precipitate an angle-closure glaucoma attack

16. One of the keys in accurate pachymetry is...
20
focus can he moved off-axis to obtain a clear reading
expensive equipment
holding the probe perpendicular to the corneal surface

17. A patient with which of the following potential diagnoses would be tested with bengal?
20
refractive surgery
severe dry eye
the appearance of dry spots

18. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
reflex tears
5 minutes
having them trace the number/figure

19. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
corneal endothelial drop-out
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
red - green - and blue

20. Rose bengal is...
white to white corneal diameter
a staining agent
red - green - and blue
3.0 D

21. Glare testing is used to identify...
decrease in vision due to glare conditions
with the central cornea
suspected acquired color defect
corneal endothelial drop-out

22. The IOLMaster evaluates each of the following except...
dacryocystitis
infrared
refractive error
varies according to the type of test

23. 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?
normal tearing
posterior subcapsular cataract
central corneal thickness
one-fourth

24. 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
2 to 3 seconds
0.3 mm
2.0 or more

25. This is not evaluated using rose Bengal except...
the defect tends to remain stable over time
holding the probe perpendicular to the corneal surface
corneal endothelial drop-out
5 minutes

26. The IOLMaster eliminates which of the following sources of error?
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
shortened axial length due to compression

27. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
patients who have had corneal refractive surgery
the cobalt blue filter
reflex tears

28. Schirmer's test I is used to measure...
IOL power
suspected acquired color defect
reflex tears
blink

29. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
the cobalt blue filter
rods
reading disabilities

30. Schirmer's test II is used to measure...
normal tearing
a staining agent
infrared
IOL power

31. The axial length of the eye is important in the calculation of...
before starting school
IOL power
dacryocystitis
refractive error

32. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
before starting school
differentiate between congenital or acquired color blindness
desired postoperative refraction
patient wearing spectacles

33. The Schirmer's test might be indicated in all of the following except...
the patient is shown a sample that is discernable to normal and abnormal alike
dacryocystitis
central corneal thickness
rods

34. The type of pachymetry used to evaluate a glaucoma suspect is...
the appearance of dry spots
central corneal thickness
IOL power
suspected acquired color defect

35. Laser interferometry uses which type of laser light?
expensive equipment
with the central cornea
infrared
narrow angles may precipitate an angle-closure glaucoma attack

36. When using a penlight to estimate anterior chamber depth - an open angle would appear...
with the central cornea
to have little or no shadow
shine the light flatly from the side - in the plane of the iris
pressing on the globe too hard with the probe

37. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
decrease in vision due to glare conditions
tear filter papers
to the left of the scleral and orbital echoes

38. Almost all of the formulas for calculating IOL power...
are based on the same general equation
IOL power
holding the probe perpendicular to the corneal surface
before starting school

39. Acquired color vision defects...
a narrow angle and bowed iris cast a shadow on the iris
dacryocystitis
more males than females
can often be cured if the causative factor is eliminated

40. When should a child have his or her color vision checked?
narrow beam
before starting school
to the left of the scleral and orbital echoes
the patient should be tested with near correction - if worn

41. When performing a brightness acuity glare test - it is best to do which of the following?
20
rods
tear filter papers
Allow the patient to adjust to the light level before reading the letters.

42. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
posterior subcapsular cataract
refractive surgery
remove the instrument from use

43. Young children can be tested using the color plates by...
A-constant
to the left of the scleral and orbital echoes
10 seconds
having them trace the number/figure

44. In which of the following would glare testing be most appropriate?
blink
to the left of the scleral and orbital echoes
varies according to the type of test administered
posterior subcapsular cataract

45. Color vision defects in children are frequently detected among those with...
A Schirmer's test of 10 mm or more is considered normal.
to the left of the scleral and orbital echoes
to have little or no shadow
reading disabilities

46. The axial length of an average adult eye is...
3.0 D
varies according to the type of test
A-constant
23 to 24 mm

47. An A-Sean can he artificially shortened due to...
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
decrease in vision due to glare conditions
20

48. Estimating the anterior chamber depth with a penlight works because...
varies according to the type of test administered
remove the instrument from use
20
a narrow angle and bowed iris cast a shadow on the iris

49. Hereditary color defects most often fall into which category?
infrared
before starting school
the patient should be tested with near correction - if worn
red-green

50. The difference between Schirmer's test I and II is...
is acceptable
the use of an anesthetic
3.0 D
a malingerer may invent a number - thus identifying him- or herself