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Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
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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. Schirmer's test I is used to measure...
reflex tears
central corneal thickness
reading disabilities
2 to 3 seconds

2. Measuring corneal thickness via nonoptical pachymetry involves the use of...
a malingerer may invent a number - thus identifying him- or herself
ultrasound
the cobalt blue filter
'test eye'

3. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
corneal endothelial drop-out
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.

4. Measuring time for the Schirmer's test is...
5 minutes
more males than females
red-green
tear filter papers

5. The difference between Schirmer's test I and II is...
0.3 mm
for screening purposes - such as job applications
the use of an anesthetic
the cobalt blue filter

6. 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?
is acceptable
central corneal thickness
one-fourth
the appearance of dry spots

7. In test a patient with the color pseudoisochromatic plates...
white to white corneal diameter
3.0 D
narrow angles may precipitate an angle-closure glaucoma attack
the patient should be tested with near correction - if worn

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

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9. When using a penlight to estimate anterior chamber depth - an open angle would appear...
both eyes equally
blink
to have little or no shadow
expensive equipment

10. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
severe dry eye
shine the light flatly from the side - in the plane of the iris
refractive surgery
the appearance of dry spots

11. An A-Sean can he artificially shortened due to...
refractive surgery
before starting school
pressing on the globe too hard with the probe
normal tearing

12. Hereditary color defects most often fall into which category?
to have little or no shadow
before starting school
varies according to the type of test administered
red-green

13. Estimating the anterior chamber depth with a penlight works because...
the patient should be tested with near correction - if worn
the patient is shown a sample that is discernable to normal and abnormal alike
a narrow angle and bowed iris cast a shadow on the iris
with the central cornea

14. Color vision defects in children are frequently detected among those with...
shortened axial length due to compression
reading disabilities
with the central cornea
2.0 or more

15. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
a staining agent
red - green - and blue
the appearance of dry spots

16. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
reflex tears
the defect tends to remain stable over time
'test eye'
varies according to the type of test administered

17. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
rods
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself

18. Rose bengal is...
the appearance of dry spots
with the central cornea
a staining agent
to the left of the scleral and orbital echoes

19. The ideal IOLMaster axial length graph is...
a narrow angle and bowed iris cast a shadow on the iris
decrease in vision due to glare conditions
23 to 24 mm
a tall - central spike with only one peak and smaller spikes on either site

20. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
more males than females
remove the instrument from use
posterior subcapsular cataract

21. When calculating intraocular lens (IOL) powers - one must enter...
tear filter papers
normal tearing
posterior subcapsular cataract
desired postoperative refraction

22. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
for screening purposes - such as job applications
red - green - and blue
to the left of the scleral and orbital echoes

23. 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
a tall - central spike with only one peak and smaller spikes on either site
remove the instrument from use
23 to 24 mm

24. 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?
holding the probe perpendicular to the corneal surface
a malingerer may invent a number - thus identifying him- or herself
0.3 mm
ultrasound

25. When should a child have his or her color vision checked?
with the central cornea
before starting school
10 seconds
to the left of the scleral and orbital echoes

26. Almost all of the formulas for calculating IOL power...
are based on the same general equation
decrease in vision due to glare conditions
IOL power
blink

27. Hereditary color vision defects affect...
white to white corneal diameter
more males than females
posterior subcapsular cataract
pressing on the globe too hard with the probe

28. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
suspected acquired color defect
before starting school
can often be cured if the causative factor is eliminated

29. Which eye structure is responsible for color vision?
rods
a staining agent
refractive error
tear filter papers

30. 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...
with the central cornea
corneal endothelial drop-out
that the sound beam is directed to the optic disc and the measurement is incorrect
is acceptable

31. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
the cobalt blue filter
reading disabilities
rods

32. A TBUT of which of the following would indicate tear film dysfunction?
more males than females
10 seconds
tear filter papers
pressing on the globe too hard with the probe

33. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
desired postoperative refraction
more males than females
differentiate between congenital or acquired color blindness

34. A rose bengal does not require the use of...
with the central cornea
the cobalt blue filter
pressing on the globe too hard with the probe
ultrasound

35. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
23 to 24 mm
A-constant
suspected acquired color defect

36. When calculating IOL power - each of the following are necessary except...
the appearance of dry spots
white to white corneal diameter
'test eye'
focus can he moved off-axis to obtain a clear reading

37. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
23 to 24 mm
a malingerer may invent a number - thus identifying him- or herself
patient wearing spectacles

38. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
blink
corneal endothelial drop-out
normal tearing
3.0 D

39. When performing pachymetry prior to refractive surgery - it is generally best to begin...
differentiate between congenital or acquired color blindness
with the central cornea
red-green
20

40. The average central thickness of the human cornea is...
that the sound beam is directed to the optic disc and the measurement is incorrect
dacryocystitis
differentiate between congenital or acquired color blindness
545 pm

41. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
one-fourth
both eyes equally
more males than females

42. Just prior to the beginning of the TBUT test - the patient is instructed to...
a narrow angle and bowed iris cast a shadow on the iris
rods
blink
'test eye'

43. Hereditary color vision defects usually affect...
both eyes equally
0.3 mm
A Schirmer's test of 10 mm or more is considered normal.
decrease in vision due to glare conditions

44. One of the keys in accurate pachymetry is...
blink
23 to 24 mm
that the sound beam is directed to the optic disc and the measurement is incorrect
holding the probe perpendicular to the corneal surface

45. Laser interferometry uses which type of laser light?
infrared
red - green - and blue
2 to 3 seconds
the defect tends to remain stable over time

46. Illumination for the color plates test...
shortened axial length due to compression
varies according to the type of test administered
with the central cornea
desired postoperative refraction

47. The IOLMaster evaluates each of the following except...
refractive error
10 seconds
more males than females
central corneal thickness

48. Young children can be tested using the color plates by...
having them trace the number/figure
decrease in vision due to glare conditions
the defect tends to remain stable over time
white to white corneal diameter

49. With the 1OLMaster - the ideal signal-to-noise ratio is...
tear filter papers
10 seconds
posterior subcapsular cataract
2.0 or more

50. The axial length of the eye is important in the calculation of...
is acceptable
IOL power
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.

Can you answer 50 questions in 15 minutes?

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Certified Ophthalmic Assistant

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