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 IOLMaster must be calibrated daily using a...

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2. A patient with which of the following potential diagnoses would be tested with bengal?
desired postoperative refraction
severe dry eye
to have little or no shadow
can often be cured if the causative factor is eliminated

3. A rose bengal does not require the use of...
ultrasound
the cobalt blue filter
reading disabilities
differentiate between congenital or acquired color blindness

4. The Ishihara color plates are useful...
red - green - and blue
a staining agent
545 pm
for screening purposes - such as job applications

5. If a biometry instrument fails to calibrate properly - one should...
holding the probe perpendicular to the corneal surface
a staining agent
remove the instrument from use
desired postoperative refraction

6. The IOLMaster evaluates each of the following except...
expensive equipment
refractive error
to have little or no shadow
23 to 24 mm

7. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
are based on the same general equation
the use of an anesthetic
dacryocystitis

8. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
0.3 mm
both eyes equally
20
decrease in vision due to glare conditions

9. The axial length of the eye is important in the calculation of...
IOL power
A Schirmer's test of 10 mm or more is considered normal.
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself

10. When using color plates - a score indicates abnormal color vision...
tear filter papers
varies according to the type of test
0.3 mm
is acceptable

11. Young children can be tested using the color plates by...
having them trace the number/figure
a malingerer may invent a number - thus identifying him- or herself
rods
to have little or no shadow

12. 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
before starting school
white to white corneal diameter
corneal endothelial drop-out

13. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
both eyes equally
decrease in vision due to glare conditions
rods

14. Schirmer's test I is used to measure...
patients who have had corneal refractive surgery
545 pm
varies according to the type of test administered
reflex tears

15. Just prior to the beginning of the TBUT test - the patient is instructed to...
having them trace the number/figure
corneal endothelial drop-out
blink
refractive surgery

16. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
normal tearing
more males than females
posterior subcapsular cataract

17. The difference between Schirmer's test I and II is...
the use of an anesthetic
red-green
both eyes equally
that the sound beam is directed to the optic disc and the measurement is incorrect

18. Hereditary color defects most often fall into which category?
a tall - central spike with only one peak and smaller spikes on either site
tear filter papers
red-green
A Schirmer's test of 10 mm or more is considered normal.

19. This is not evaluated using rose Bengal except...
red-green
pressing on the globe too hard with the probe
focus can he moved off-axis to obtain a clear reading
corneal endothelial drop-out

20. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
the use of an anesthetic
IOL power
holding the probe perpendicular to the corneal surface

21. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
pressing on the globe too hard with the probe
the defect tends to remain stable over time
the patient should be tested with near correction - if worn
remove the instrument from use

22. Schirmer's test II is used to measure...
normal tearing
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading
shortened axial length due to compression

23. When calculating IOL power - each of the following are necessary except...
reading disabilities
red - green - and blue
white to white corneal diameter
posterior subcapsular cataract

24. Laser interferometry uses which type of laser light?
severe dry eye
tear filter papers
more males than females
infrared

25. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
10 seconds
narrow beam
suspected acquired color defect

26. Color vision testing is used to detect all of the following except...
tear filter papers
differentiate between congenital or acquired color blindness
one-fourth
the use of an anesthetic

27. Acquired color vision defects...
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness
the use of an anesthetic
can often be cured if the causative factor is eliminated

28. Before proceeding with the actual color plate test...
0.3 mm
blink
the patient is shown a sample that is discernable to normal and abnormal alike
2.0 or more

29. Rose bengal is...
patients who have had corneal refractive surgery
rods
the use of an anesthetic
a staining agent

30. When should a child have his or her color vision checked?
remove the instrument from use
to have little or no shadow
dacryocystitis
before starting school

31. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
A Schirmer's test of 10 mm or more is considered normal.
the patient is shown a sample that is discernable to normal and abnormal alike
patient wearing spectacles
a tall - central spike with only one peak and smaller spikes on either site

32. The average central thickness of the human cornea is...
545 pm
more males than females
patient wearing spectacles
normal tearing

33. 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...
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect
differentiate between congenital or acquired color blindness
shortened axial length due to compression

34. The ideal IOLMaster axial length graph is...
refractive error
a tall - central spike with only one peak and smaller spikes on either site
23 to 24 mm
corneal endothelial drop-out

35. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
0.3 mm
a tall - central spike with only one peak and smaller spikes on either site
narrow beam
red-green

36. Which of the following should be color-vision tested one eye at a time?
10 seconds
suspected acquired color defect
IOL power
23 to 24 mm

37. In test a patient with the color pseudoisochromatic plates...
'test eye'
both eyes equally
2.0 or more
the patient should be tested with near correction - if worn

38. When performing the TBUT test - the observer is looking for...
to the left of the scleral and orbital echoes
pressing on the globe too hard with the probe
the appearance of dry spots
a tall - central spike with only one peak and smaller spikes on either site

39. 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
0.3 mm
a staining agent
suspected acquired color defect

40. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
a staining agent
infrared
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness

41. When using a penlight to estimate anterior chamber depth - an open angle would appear...
a malingerer may invent a number - thus identifying him- or herself
red - green - and blue
normal tearing
to have little or no shadow

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

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43. It is important to estimate the anterior chamber depth prior to dilation because...
can often be cured if the causative factor is eliminated
the appearance of dry spots
is acceptable
narrow angles may precipitate an angle-closure glaucoma attack

44. A TBUT of which of the following would indicate tear film dysfunction?
normal tearing
10 seconds
with the central cornea
to the left of the scleral and orbital echoes

45. _______ are not used in evaluating tear break-up time (TBUT)
reading disabilities
IOL power
a narrow angle and bowed iris cast a shadow on the iris
tear filter papers

46. An A-Sean can he artificially shortened due to...
with the central cornea
severe dry eye
to the left of the scleral and orbital echoes
pressing on the globe too hard with the probe

47. Glare testing is used to identify...
the appearance of dry spots
shortened axial length due to compression
posterior subcapsular cataract
decrease in vision due to glare conditions

48. When performing a brightness acuity glare test - it is best to do which of the following?
blink
Allow the patient to adjust to the light level before reading the letters.
remove the instrument from use
normal tearing

49. The axial length of an average adult eye is...
23 to 24 mm
are based on the same general equation
normal tearing
narrow beam

50. 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?
the cobalt blue filter
red-green
one-fourth
the defect tends to remain stable over time