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 rose bengal does not require the use of...
the cobalt blue filter
can often be cured if the causative factor is eliminated
the patient should be tested with near correction - if worn
both eyes equally

2. Measuring time for the Schirmer's test is...
expensive equipment
narrow angles may precipitate an angle-closure glaucoma attack
5 minutes
severe dry eye

3. Rose bengal is...
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect
2.0 or more
Allow the patient to adjust to the light level before reading the letters.

4. When calculating intraocular lens (IOL) powers - one must enter...
pressing on the globe too hard with the probe
central corneal thickness
both eyes equally
desired postoperative refraction

5. With the 1OLMaster - the ideal signal-to-noise ratio is...
the appearance of dry spots
refractive error
2.0 or more
varies according to the type of test

6. When should a child have his or her color vision checked?
shortened axial length due to compression
before starting school
severe dry eye
that the sound beam is directed to the optic disc and the measurement is incorrect

7. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
red-green
narrow beam
a staining agent

8. 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?
with the central cornea
patients who have had corneal refractive surgery
one-fourth
the cobalt blue filter

9. When performing the TBUT test - the observer is looking for...
0.3 mm
focus can he moved off-axis to obtain a clear reading
the appearance of dry spots
23 to 24 mm

10. One of the keys in accurate pachymetry is...
10 seconds
decrease in vision due to glare conditions
ultrasound
holding the probe perpendicular to the corneal surface

11. If a biometry instrument fails to calibrate properly - one should...
one-fourth
patient wearing spectacles
the patient is shown a sample that is discernable to normal and abnormal alike
remove the instrument from use

12. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
both eyes equally
the use of an anesthetic
reading disabilities

13. Schirmer's test II is used to measure...
normal tearing
2.0 or more
the patient should be tested with near correction - if worn
varies according to the type of test administered

14. Young children can be tested using the color plates by...
a staining agent
having them trace the number/figure
A-constant
are based on the same general equation

15. When calculating IOL power - each of the following are necessary except...
dacryocystitis
focus can he moved off-axis to obtain a clear reading
holding the probe perpendicular to the corneal surface
white to white corneal diameter

16. It is important to estimate the anterior chamber depth prior to dilation because...
the appearance of dry spots
narrow angles may precipitate an angle-closure glaucoma attack
the cobalt blue filter
rods

17. Laser interferometry uses which type of laser light?
infrared
dacryocystitis
posterior subcapsular cataract
severe dry eye

18. Pachymetry readings are routinely taken prior to...
varies according to the type of test administered
545 pm
refractive surgery
a malingerer may invent a number - thus identifying him- or herself

19. The ideal IOLMaster axial length graph is...
545 pm
holding the probe perpendicular to the corneal surface
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

20. A color plate that shows no obvious number to normal and abnormal alike is useful because...
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself
to the left of the scleral and orbital echoes
blink

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
for screening purposes - such as job applications
a narrow angle and bowed iris cast a shadow on the iris
narrow angles may precipitate an angle-closure glaucoma attack

22. The photosensitive pigments of the eye are sensitive to...
Allow the patient to adjust to the light level before reading the letters.
severe dry eye
focus can he moved off-axis to obtain a clear reading
red - green - and blue

23. 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.
20
posterior subcapsular cataract
shine the light flatly from the side - in the plane of the iris

24. A patient with which of the following potential diagnoses would be tested with bengal?
the patient should be tested with near correction - if worn
red - green - and blue
the appearance of dry spots
severe dry eye

25. A TBUT of which of the following would indicate tear film dysfunction?
the appearance of dry spots
10 seconds
with the central cornea
varies according to the type of test

26. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
red-green
with the central cornea
expensive equipment

27. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
holding the probe perpendicular to the corneal surface
ultrasound
the defect tends to remain stable over time
differentiate between congenital or acquired color blindness

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

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29. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
0.3 mm
patient wearing spectacles
2 to 3 seconds

30. _______ are not used in evaluating tear break-up time (TBUT)
corneal endothelial drop-out
tear filter papers
narrow beam
shine the light flatly from the side - in the plane of the iris

31. How long should the patient be given to recognize the figure in a color plate?
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test
rods
2 to 3 seconds

32. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patients who have had corneal refractive surgery
differentiate between congenital or acquired color blindness
patient wearing spectacles
having them trace the number/figure

33. The difference between Schirmer's test I and II is...
5 minutes
suspected acquired color defect
the use of an anesthetic
with the central cornea

34. Which of the following should be color-vision tested one eye at a time?
more males than females
suspected acquired color defect
shine the light flatly from the side - in the plane of the iris
remove the instrument from use

35. Schirmer's test does not require _____ except Test strips
expensive equipment
patient wearing spectacles
23 to 24 mm
tear filter papers

36. 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?
desired postoperative refraction
the cobalt blue filter
0.3 mm
2 to 3 seconds

37. The average central thickness of the human cornea is...
shortened axial length due to compression
a narrow angle and bowed iris cast a shadow on the iris
pressing on the globe too hard with the probe
545 pm

38. 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 malingerer may invent a number - thus identifying him- or herself
A Schirmer's test of 10 mm or more is considered normal.
can often be cured if the causative factor is eliminated
A-constant

39. Acquired color vision defects...
varies according to the type of test
a staining agent
patients who have had corneal refractive surgery
can often be cured if the causative factor is eliminated

40. Almost all of the formulas for calculating IOL power...
are based on the same general equation
that the sound beam is directed to the optic disc and the measurement is incorrect
before starting school
narrow beam

41. Color vision testing is used to detect all of the following except...
for screening purposes - such as job applications
differentiate between congenital or acquired color blindness
blink
narrow angles may precipitate an angle-closure glaucoma attack

42. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
20
posterior subcapsular cataract
expensive equipment

43. In which of the following would glare testing be most appropriate?
is acceptable
the use of an anesthetic
posterior subcapsular cataract
focus can he moved off-axis to obtain a clear reading

44. Hereditary color vision defects usually affect...
both eyes equally
'test eye'
red - green - and blue
to have little or no shadow

45. Color vision defects in children are frequently detected among those with...
holding the probe perpendicular to the corneal surface
2 to 3 seconds
reading disabilities
are based on the same general equation

46. Which eye structure is responsible for color vision?
ultrasound
rods
2.0 or more
shine the light flatly from the side - in the plane of the iris

47. In evaluating an axial length scan - the retinal echo must be...
'test eye'
to the left of the scleral and orbital echoes
patients who have had corneal refractive surgery
tear filter papers

48. Estimating the anterior chamber depth with a penlight works because...
tear filter papers
can often be cured if the causative factor is eliminated
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time

49. When using a penlight to estimate anterior chamber depth - an open angle would appear...
the defect tends to remain stable over time
holding the probe perpendicular to the corneal surface
to have little or no shadow
a malingerer may invent a number - thus identifying him- or herself

50. Schirmer's test I is used to measure...
refractive surgery
reflex tears
to have little or no shadow
before starting school