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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. It is important to estimate the anterior chamber depth prior to dilation because...
a malingerer may invent a number - thus identifying him- or herself
narrow beam
narrow angles may precipitate an angle-closure glaucoma attack
ultrasound

2. 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?
545 pm
the appearance of dry spots
0.3 mm
with the central cornea

3. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
pressing on the globe too hard with the probe
the patient should be tested with near correction - if worn
patient wearing spectacles

4. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
central corneal thickness
10 seconds
infrared

5. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
are based on the same general equation
decrease in vision due to glare conditions
central corneal thickness

6. An A-Sean can he artificially shortened due to...
Allow the patient to adjust to the light level before reading the letters.
the appearance of dry spots
pressing on the globe too hard with the probe
3.0 D

7. The difference between Schirmer's test I and II is...
severe dry eye
the use of an anesthetic
refractive surgery
to have little or no shadow

8. 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
5 minutes
10 seconds
central corneal thickness

9. Schirmer's test does not require _____ except Test strips
holding the probe perpendicular to the corneal surface
with the central cornea
expensive equipment
varies according to the type of test

10. One of the keys in accurate pachymetry is...
red-green
rods
holding the probe perpendicular to the corneal surface
ultrasound

11. The axial length of the eye is important in the calculation of...
desired postoperative refraction
suspected acquired color defect
545 pm
IOL power

12. The IOLMaster eliminates which of the following sources of error?
infrared
shortened axial length due to compression
corneal endothelial drop-out
normal tearing

13. Before proceeding with the actual color plate test...
normal tearing
the patient is shown a sample that is discernable to normal and abnormal alike
shine the light flatly from the side - in the plane of the iris
pressing on the globe too hard with the probe

14. When performing pachymetry prior to refractive surgery - it is generally best to begin...
narrow beam
with the central cornea
the patient is shown a sample that is discernable to normal and abnormal alike
2 to 3 seconds

15. The average central thickness of the human cornea is...
545 pm
2.0 or more
desired postoperative refraction
IOL power

16. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
focus can he moved off-axis to obtain a clear reading
desired postoperative refraction
the defect tends to remain stable over time
severe dry eye

17. When performing a brightness acuity glare test - it is best to do which of the following?
remove the instrument from use
is acceptable
Allow the patient to adjust to the light level before reading the letters.
white to white corneal diameter

18. Laser interferometry uses which type of laser light?
varies according to the type of test
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
infrared

19. When should a child have his or her color vision checked?
before starting school
ultrasound
the cobalt blue filter
a narrow angle and bowed iris cast a shadow on the iris

20. 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)...
can often be cured if the causative factor is eliminated
varies according to the type of test administered
A-constant
posterior subcapsular cataract

21. 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
the use of an anesthetic
patient wearing spectacles
ultrasound

22. Illumination for the color plates test...
A Schirmer's test of 10 mm or more is considered normal.
severe dry eye
varies according to the type of test administered
are based on the same general equation

23. The IOLMaster must be calibrated daily using a...
the use of an anesthetic
narrow beam
'test eye'
shortened axial length due to compression

24. The Schirmer's test might be indicated in all of the following except...
suspected acquired color defect
dacryocystitis
central corneal thickness
varies according to the type of test administered

25. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
the patient is shown a sample that is discernable to normal and abnormal alike
infrared
a tall - central spike with only one peak and smaller spikes on either site

26. Acquired color vision defects...
can often be cured if the causative factor is eliminated
shine the light flatly from the side - in the plane of the iris
red - green - and blue
narrow beam

27. The ideal IOLMaster axial length graph is...
reading disabilities
a tall - central spike with only one peak and smaller spikes on either site
central corneal thickness
red - green - and blue

28. Measuring time for the Schirmer's test is...
holding the probe perpendicular to the corneal surface
23 to 24 mm
5 minutes
tear filter papers

29. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
white to white corneal diameter
the use of an anesthetic
patient wearing spectacles
3.0 D

30. Hereditary color vision defects affect...
3.0 D
severe dry eye
blink
more males than females

31. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
reflex tears
central corneal thickness
focus can he moved off-axis to obtain a clear reading

32. A normally functioning lacrimal gland will produce by much wetting on a Schirmer's test strip after 5 minutes?
patient wearing spectacles
A Schirmer's test of 10 mm or more is considered normal.
2 to 3 seconds
with the central cornea

33. The axial length of an average adult eye is...
23 to 24 mm
2 to 3 seconds
reflex tears
expensive equipment

34. Schirmer's test I is used to measure...
'test eye'
expensive equipment
shine the light flatly from the side - in the plane of the iris
reflex tears

35. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
refractive error
varies according to the type of test
central corneal thickness

36. In test a patient with the color pseudoisochromatic plates...
posterior subcapsular cataract
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself
A-constant

37. In evaluating an axial length scan - the retinal echo must be...
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery
rods
to the left of the scleral and orbital echoes

38. In which of the following would glare testing be most appropriate?
having them trace the number/figure
varies according to the type of test
one-fourth
posterior subcapsular cataract

39. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
varies according to the type of test administered
'test eye'
IOL power

40. Hereditary color vision defects usually affect...
10 seconds
both eyes equally
decrease in vision due to glare conditions
refractive surgery

41. Rose bengal is...
more males than females
the cobalt blue filter
a staining agent
varies according to the type of test administered

42. Almost all of the formulas for calculating IOL power...
varies according to the type of test administered
are based on the same general equation
a tall - central spike with only one peak and smaller spikes on either site
a staining agent

43. Just prior to the beginning of the TBUT test - the patient is instructed to...
remove the instrument from use
for screening purposes - such as job applications
blink
that the sound beam is directed to the optic disc and the measurement is incorrect

44. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
dacryocystitis
patients who have had corneal refractive surgery
for screening purposes - such as job applications
a tall - central spike with only one peak and smaller spikes on either site

45. Color vision defects in children are frequently detected among those with...
refractive error
varies according to the type of test administered
is acceptable
reading disabilities

46. The Ishihara color plates are useful...
for screening purposes - such as job applications
with the central cornea
one-fourth
infrared

47. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
red-green
narrow angles may precipitate an angle-closure glaucoma attack
0.3 mm

48. The IOLMaster evaluates each of the following except...
rods
refractive error
that the sound beam is directed to the optic disc and the measurement is incorrect
a staining agent

49. Pachymetry readings are routinely taken prior to...
differentiate between congenital or acquired color blindness
refractive surgery
both eyes equally
a staining agent

50. A patient with which of the following potential diagnoses would be tested with bengal?
refractive surgery
20
to have little or no shadow
severe dry eye

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