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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. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
normal tearing
A-constant
differentiate between congenital or acquired color blindness

2. Acquired color vision defects...
the patient is shown a sample that is discernable to normal and abnormal alike
normal tearing
is acceptable
can often be cured if the causative factor is eliminated

3. 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.
'test eye'
pressing on the globe too hard with the probe
tear filter papers

4. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
differentiate between congenital or acquired color blindness
IOL power
narrow beam

5. When positioning the IOLMaster for the axial length reading...
narrow beam
the patient is shown a sample that is discernable to normal and abnormal alike
focus can he moved off-axis to obtain a clear reading
both eyes equally

6. Hereditary color defects most often fall into which category?
blink
to the left of the scleral and orbital echoes
desired postoperative refraction
red-green

7. 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
severe dry eye
pressing on the globe too hard with the probe
3.0 D

8. In which of the following would glare testing be most appropriate?
focus can he moved off-axis to obtain a clear reading
posterior subcapsular cataract
white to white corneal diameter
holding the probe perpendicular to the corneal surface

9. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
is acceptable
shine the light flatly from the side - in the plane of the iris
refractive error
patients who have had corneal refractive surgery

10. Almost all of the formulas for calculating IOL power...
varies according to the type of test administered
are based on the same general equation
expensive equipment
2.0 or more

11. Pachymetry readings are routinely taken prior to...
23 to 24 mm
2 to 3 seconds
more males than females
refractive surgery

12. Estimating the anterior chamber depth with a penlight works because...
infrared
ultrasound
varies according to the type of test
a narrow angle and bowed iris cast a shadow on the iris

13. 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 use of an anesthetic
red - green - and blue
that the sound beam is directed to the optic disc and the measurement is incorrect
both eyes equally

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

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15. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
patient wearing spectacles
is acceptable
remove the instrument from use
red - green - and blue

16. The type of pachymetry used to evaluate a glaucoma suspect is...
IOL power
tear filter papers
central corneal thickness
focus can he moved off-axis to obtain a clear reading

17. Young children can be tested using the color plates by...
severe dry eye
having them trace the number/figure
dacryocystitis
one-fourth

18. A rose bengal does not require the use of...
a tall - central spike with only one peak and smaller spikes on either site
are based on the same general equation
before starting school
the cobalt blue filter

19. The difference between Schirmer's test I and II is...
the use of an anesthetic
more males than females
blink
narrow angles may precipitate an angle-closure glaucoma attack

20. The Schirmer's test might be indicated in all of the following except...
corneal endothelial drop-out
red-green
before starting school
dacryocystitis

21. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
Allow the patient to adjust to the light level before reading the letters.
tear filter papers
pressing on the globe too hard with the probe

22. 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?
is acceptable
to the left of the scleral and orbital echoes
decrease in vision due to glare conditions
0.3 mm

23. In test a patient with the color pseudoisochromatic plates...
10 seconds
rods
that the sound beam is directed to the optic disc and the measurement is incorrect
the patient should be tested with near correction - if worn

24. Just prior to the beginning of the TBUT test - the patient is instructed to...
holding the probe perpendicular to the corneal surface
blink
central corneal thickness
red - green - and blue

25. A color plate that shows no obvious number to normal and abnormal alike is useful because...
holding the probe perpendicular to the corneal surface
2.0 or more
a malingerer may invent a number - thus identifying him- or herself
posterior subcapsular cataract

26. When calculating intraocular lens (IOL) powers - one must enter...
the use of an anesthetic
the cobalt blue filter
shortened axial length due to compression
desired postoperative refraction

27. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the patient should be tested with near correction - if worn
red-green
narrow beam
3.0 D

28. _______ are not used in evaluating tear break-up time (TBUT)
red - green - and blue
tear filter papers
that the sound beam is directed to the optic disc and the measurement is incorrect
narrow angles may precipitate an angle-closure glaucoma attack

29. The ideal IOLMaster axial length graph is...
20
the cobalt blue filter
shortened axial length due to compression
a tall - central spike with only one peak and smaller spikes on either site

30. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
a narrow angle and bowed iris cast a shadow on the iris
IOL power
545 pm

31. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
varies according to the type of test administered
narrow beam
the patient is shown a sample that is discernable to normal and abnormal alike
a malingerer may invent a number - thus identifying him- or herself

32. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
red-green
both eyes equally
'test eye'

33. How long should the patient be given to recognize the figure in a color plate?
that the sound beam is directed to the optic disc and the measurement is incorrect
a malingerer may invent a number - thus identifying him- or herself
2 to 3 seconds
reading disabilities

34. A patient with which of the following potential diagnoses would be tested with bengal?
shortened axial length due to compression
red-green
A-constant
severe dry eye

35. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
shine the light flatly from the side - in the plane of the iris
dacryocystitis
more males than females

36. 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?
refractive error
one-fourth
holding the probe perpendicular to the corneal surface
23 to 24 mm

37. The photosensitive pigments of the eye are sensitive to...
3.0 D
a tall - central spike with only one peak and smaller spikes on either site
both eyes equally
red - green - and blue

38. An A-Sean can he artificially shortened due to...
23 to 24 mm
that the sound beam is directed to the optic disc and the measurement is incorrect
severe dry eye
pressing on the globe too hard with the probe

39. Schirmer's test I is used to measure...
Allow the patient to adjust to the light level before reading the letters.
reflex tears
the patient is shown a sample that is discernable to normal and abnormal alike
the patient should be tested with near correction - if worn

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

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41. Illumination for the color plates test...
are based on the same general equation
varies according to the type of test administered
shine the light flatly from the side - in the plane of the iris
patients who have had corneal refractive surgery

42. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
545 pm
a staining agent
the defect tends to remain stable over time
narrow beam

43. When performing pachymetry prior to refractive surgery - it is generally best to begin...
is acceptable
with the central cornea
to have little or no shadow
3.0 D

44. The IOLMaster eliminates which of the following sources of error?
decrease in vision due to glare conditions
the use of an anesthetic
shortened axial length due to compression
blink

45. Glare testing is used to identify...
corneal endothelial drop-out
decrease in vision due to glare conditions
a tall - central spike with only one peak and smaller spikes on either site
narrow angles may precipitate an angle-closure glaucoma attack

46. When performing the TBUT test - the observer is looking for...
varies according to the type of test
the appearance of dry spots
a narrow angle and bowed iris cast a shadow on the iris
one-fourth

47. Hereditary color vision defects affect...
before starting school
5 minutes
IOL power
more males than females

48. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
more males than females
patient wearing spectacles
a staining agent
red-green

49. The IOLMaster evaluates each of the following except...
IOL power
refractive error
can often be cured if the causative factor is eliminated
for screening purposes - such as job applications

50. Schirmer's test does not require _____ except Test strips
to the left of the scleral and orbital echoes
patients who have had corneal refractive surgery
for screening purposes - such as job applications
expensive equipment

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Certified Ophthalmic Assistant

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