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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. 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
3.0 D
varies according to the type of test administered
reading disabilities

2. Hereditary color defects most often fall into which category?
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green
545 pm
before starting school

3. When should a child have his or her color vision checked?
before starting school
refractive surgery
for screening purposes - such as job applications
23 to 24 mm

4. With the 1OLMaster - the ideal signal-to-noise ratio is...
varies according to the type of test
2.0 or more
2 to 3 seconds
red - green - and blue

5. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
having them trace the number/figure
can often be cured if the causative factor is eliminated
IOL power

6. When performing the TBUT test - the observer is looking for...
desired postoperative refraction
remove the instrument from use
focus can he moved off-axis to obtain a clear reading
the appearance of dry spots

7. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
posterior subcapsular cataract
is acceptable
Allow the patient to adjust to the light level before reading the letters.
red-green

8. Illumination for the color plates test...
varies according to the type of test administered
0.3 mm
10 seconds
dacryocystitis

9. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
a narrow angle and bowed iris cast a shadow on the iris
A-constant
the use of an anesthetic

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

11. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
rods
normal tearing
refractive surgery

12. The axial length of an average adult eye is...
0.3 mm
23 to 24 mm
tear filter papers
central corneal thickness

13. A rose bengal does not require the use of...
the cobalt blue filter
desired postoperative refraction
suspected acquired color defect
narrow angles may precipitate an angle-closure glaucoma attack

14. A patient with which of the following potential diagnoses would be tested with bengal?
the patient is shown a sample that is discernable to normal and abnormal alike
expensive equipment
the patient should be tested with near correction - if worn
severe dry eye

15. Before proceeding with the actual color plate test...
red - green - and blue
shine the light flatly from the side - in the plane of the iris
a tall - central spike with only one peak and smaller spikes on either site
the patient is shown a sample that is discernable to normal and abnormal alike

16. Schirmer's test does not require _____ except Test strips
0.3 mm
patients who have had corneal refractive surgery
expensive equipment
A-constant

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
2.0 or more
a narrow angle and bowed iris cast a shadow on the iris
reflex tears

18. Young children can be tested using the color plates by...
one-fourth
is acceptable
having them trace the number/figure
decrease in vision due to glare conditions

19. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
A-constant
a staining agent
normal tearing

20. When performing pachymetry prior to refractive surgery - it is generally best to begin...
Allow the patient to adjust to the light level before reading the letters.
with the central cornea
red - green - and blue
the defect tends to remain stable over time

21. 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)...
refractive error
rods
A-constant
a tall - central spike with only one peak and smaller spikes on either site

22. This is not evaluated using rose Bengal except...
2.0 or more
expensive equipment
corneal endothelial drop-out
reading disabilities

23. 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?
0.3 mm
one-fourth
refractive error
'test eye'

24. Schirmer's test II is used to measure...
narrow beam
IOL power
normal tearing
a narrow angle and bowed iris cast a shadow on the iris

25. The Ishihara color plates are useful...
the appearance of dry spots
is acceptable
infrared
for screening purposes - such as job applications

26. In test a patient with the color pseudoisochromatic plates...
refractive surgery
a tall - central spike with only one peak and smaller spikes on either site
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn

27. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
white to white corneal diameter
2.0 or more
the patient is shown a sample that is discernable to normal and abnormal alike
patients who have had corneal refractive surgery

28. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
10 seconds
patient wearing spectacles
is acceptable
expensive equipment

29. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
differentiate between congenital or acquired color blindness
3.0 D
to the left of the scleral and orbital echoes

30. It is important to estimate the anterior chamber depth prior to dilation because...
both eyes equally
the appearance of dry spots
severe dry eye
narrow angles may precipitate an angle-closure glaucoma attack

31. Schirmer's test I is used to measure...
ultrasound
decrease in vision due to glare conditions
reflex tears
is acceptable

32. Measuring time for the Schirmer's test is...
5 minutes
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
patients who have had corneal refractive surgery

33. The ideal IOLMaster axial length graph is...
red-green
a tall - central spike with only one peak and smaller spikes on either site
reflex tears
suspected acquired color defect

34. The type of pachymetry used to evaluate a glaucoma suspect is...
red-green
having them trace the number/figure
one-fourth
central corneal thickness

35. Rose bengal is...
a malingerer may invent a number - thus identifying him- or herself
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect
holding the probe perpendicular to the corneal surface

36. 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...
a malingerer may invent a number - thus identifying him- or herself
that the sound beam is directed to the optic disc and the measurement is incorrect
remove the instrument from use
IOL power

37. Estimating the anterior chamber depth with a penlight works because...
patients who have had corneal refractive surgery
with the central cornea
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris

38. The photosensitive pigments of the eye are sensitive to...
5 minutes
central corneal thickness
patients who have had corneal refractive surgery
red - green - and blue

39. In evaluating an axial length scan - the retinal echo must be...
patient wearing spectacles
differentiate between congenital or acquired color blindness
to the left of the scleral and orbital echoes
545 pm

40. The Schirmer's test might be indicated in all of the following except...
more males than females
reflex tears
normal tearing
dacryocystitis

41. Which of the following should be color-vision tested one eye at a time?
infrared
suspected acquired color defect
red-green
A Schirmer's test of 10 mm or more is considered normal.

42. 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
expensive equipment
can often be cured if the causative factor is eliminated
to the left of the scleral and orbital echoes

43. Color vision defects in children are frequently detected among those with...
more males than females
desired postoperative refraction
reading disabilities
varies according to the type of test administered

44. The difference between Schirmer's test I and II is...
more males than females
2.0 or more
dacryocystitis
the use of an anesthetic

45. Which eye structure is responsible for color vision?
the use of an anesthetic
rods
shortened axial length due to compression
that the sound beam is directed to the optic disc and the measurement is incorrect

46. The average central thickness of the human cornea is...
545 pm
differentiate between congenital or acquired color blindness
white to white corneal diameter
dacryocystitis

47. In which of the following would glare testing be most appropriate?
IOL power
posterior subcapsular cataract
corneal endothelial drop-out
varies according to the type of test administered

48. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a malingerer may invent a number - thus identifying him- or herself
ultrasound
2.0 or more
20

49. Almost all of the formulas for calculating IOL power...
a staining agent
are based on the same general equation
corneal endothelial drop-out
varies according to the type of test

50. Acquired color vision defects...
reading disabilities
desired postoperative refraction
can often be cured if the causative factor is eliminated
corneal endothelial drop-out

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Certified Ophthalmic Assistant

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