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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. The IOLMaster evaluates each of the following except...
posterior subcapsular cataract
normal tearing
having them trace the number/figure
refractive error

2. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
central corneal thickness
20
are based on the same general equation
the patient should be tested with near correction - if worn

3. This is not evaluated using rose Bengal except...
Allow the patient to adjust to the light level before reading the letters.
the patient should be tested with near correction - if worn
corneal endothelial drop-out
to the left of the scleral and orbital echoes

4. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
to have little or no shadow
patient wearing spectacles
a malingerer may invent a number - thus identifying him- or herself
can often be cured if the causative factor is eliminated

5. When using color plates - a score indicates abnormal color vision...
focus can he moved off-axis to obtain a clear reading
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.

6. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
varies according to the type of test
differentiate between congenital or acquired color blindness
is acceptable
narrow angles may precipitate an angle-closure glaucoma attack

7. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
desired postoperative refraction
are based on the same general equation
reading disabilities

8. The ideal IOLMaster axial length graph is...
blink
a tall - central spike with only one peak and smaller spikes on either site
holding the probe perpendicular to the corneal surface
refractive surgery

9. Glare testing is used to identify...
severe dry eye
narrow angles may precipitate an angle-closure glaucoma attack
decrease in vision due to glare conditions
2.0 or more

10. In evaluating an axial length scan - the retinal echo must be...
20
to the left of the scleral and orbital echoes
3.0 D
0.3 mm

11. When calculating IOL power - each of the following are necessary except...
differentiate between congenital or acquired color blindness
white to white corneal diameter
red-green
corneal endothelial drop-out

12. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn
narrow beam
red - green - and blue

13. When performing a brightness acuity glare test - it is best to do which of the following?
ultrasound
20
Allow the patient to adjust to the light level before reading the letters.
the patient is shown a sample that is discernable to normal and abnormal alike

14. Acquired color vision defects...
can often be cured if the causative factor is eliminated
holding the probe perpendicular to the corneal surface
refractive error
reflex tears

15. Which eye structure is responsible for color vision?
5 minutes
decrease in vision due to glare conditions
rods
the use of an anesthetic

16. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally
A Schirmer's test of 10 mm or more is considered normal.
normal tearing

17. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
2 to 3 seconds
infrared
shine the light flatly from the side - in the plane of the iris
having them trace the number/figure

18. A rose bengal does not require the use of...
varies according to the type of test
'test eye'
the cobalt blue filter
a narrow angle and bowed iris cast a shadow on the iris

19. Rose bengal is...
'test eye'
can often be cured if the causative factor is eliminated
desired postoperative refraction
a staining agent

20. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
a narrow angle and bowed iris cast a shadow on the iris
a staining agent
patients who have had corneal refractive surgery

21. The average central thickness of the human cornea is...
545 pm
refractive surgery
refractive error
a narrow angle and bowed iris cast a shadow on the iris

22. If a biometry instrument fails to calibrate properly - one should...
decrease in vision due to glare conditions
remove the instrument from use
545 pm
one-fourth

23. Schirmer's test II is used to measure...
shine the light flatly from the side - in the plane of the iris
normal tearing
the defect tends to remain stable over time
with the central cornea

24. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
A-constant
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis

25. Schirmer's test I is used to measure...
with the central cornea
reflex tears
shortened axial length due to compression
suspected acquired color defect

26. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
reading disabilities
focus can he moved off-axis to obtain a clear reading
narrow beam

27. Before proceeding with the actual color plate test...
normal tearing
reading disabilities
the patient is shown a sample that is discernable to normal and abnormal alike
patient wearing spectacles

28. 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?
one-fourth
a malingerer may invent a number - thus identifying him- or herself
the use of an anesthetic
pressing on the globe too hard with the probe

29. The Ishihara color plates are useful...
10 seconds
for screening purposes - such as job applications
varies according to the type of test administered
is acceptable

30. The photosensitive pigments of the eye are sensitive to...
20
23 to 24 mm
refractive error
red - green - and blue

31. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
narrow angles may precipitate an angle-closure glaucoma attack
patient wearing spectacles
more males than females

32. A color plate that shows no obvious number to normal and abnormal alike is useful because...
holding the probe perpendicular to the corneal surface
for screening purposes - such as job applications
a malingerer may invent a number - thus identifying him- or herself
narrow beam

33. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
23 to 24 mm
2 to 3 seconds
normal tearing

34. Illumination for the color plates test...
varies according to the type of test administered
narrow angles may precipitate an angle-closure glaucoma attack
red - green - and blue
patient wearing spectacles

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

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36. The axial length of an average adult eye is...
central corneal thickness
refractive error
23 to 24 mm
that the sound beam is directed to the optic disc and the measurement is incorrect

37. When should a child have his or her color vision checked?
for screening purposes - such as job applications
before starting school
focus can he moved off-axis to obtain a clear reading
expensive equipment

38. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
10 seconds
patients who have had corneal refractive surgery
infrared

39. Hereditary color vision defects affect...
Allow the patient to adjust to the light level before reading the letters.
more males than females
dacryocystitis
pressing on the globe too hard with the probe

40. Measuring time for the Schirmer's test is...
5 minutes
expensive equipment
posterior subcapsular cataract
blink

41. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
decrease in vision due to glare conditions
tear filter papers
severe dry eye

42. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
0.3 mm
a malingerer may invent a number - thus identifying him- or herself
Allow the patient to adjust to the light level before reading the letters.
patients who have had corneal refractive surgery

43. Hereditary color vision defects usually affect...
pressing on the globe too hard with the probe
both eyes equally
a staining agent
2 to 3 seconds

44. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
one-fourth
remove the instrument from use
5 minutes
3.0 D

45. Schirmer's test does not require _____ except Test strips
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
IOL power
the defect tends to remain stable over time

46. An A-Sean can he artificially shortened due to...
one-fourth
3.0 D
varies according to the type of test
pressing on the globe too hard with the probe

47. When positioning the IOLMaster for the axial length reading...
narrow beam
blink
the patient should be tested with near correction - if worn
focus can he moved off-axis to obtain a clear reading

48. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
with the central cornea
both eyes equally

49. When using a penlight to estimate anterior chamber depth - an open angle would appear...
blink
to have little or no shadow
red - green - and blue
decrease in vision due to glare conditions

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