Test your basic knowledge |

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. Hereditary color vision defects usually affect...
the appearance of dry spots
both eyes equally
Allow the patient to adjust to the light level before reading the letters.
one-fourth

2. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
the patient should be tested with near correction - if worn
before starting school
is acceptable

3. 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 patient is shown a sample that is discernable to normal and abnormal alike
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
more males than females

4. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
Allow the patient to adjust to the light level before reading the letters.
A-constant
to have little or no shadow

5. Young children can be tested using the color plates by...
for screening purposes - such as job applications
rods
reflex tears
having them trace the number/figure

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

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7. The average central thickness of the human cornea is...
the patient should be tested with near correction - if worn
a narrow angle and bowed iris cast a shadow on the iris
545 pm
a staining agent

8. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
more males than females
Allow the patient to adjust to the light level before reading the letters.
0.3 mm

9. 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?
a malingerer may invent a number - thus identifying him- or herself
0.3 mm
are based on the same general equation
suspected acquired color defect

10. Schirmer's test II is used to measure...
0.3 mm
normal tearing
refractive surgery
a staining agent

11. 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
3.0 D
holding the probe perpendicular to the corneal surface
23 to 24 mm

12. Rose bengal is...
3.0 D
a staining agent
23 to 24 mm
suspected acquired color defect

13. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
remove the instrument from use
can often be cured if the causative factor is eliminated
refractive error

14. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike
tear filter papers
differentiate between congenital or acquired color blindness

15. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
0.3 mm
blink
red-green

16. The Ishihara color plates are useful...
for screening purposes - such as job applications
one-fourth
is acceptable
patients who have had corneal refractive surgery

17. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
both eyes equally
white to white corneal diameter
severe dry eye

18. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
before starting school
A-constant
differentiate between congenital or acquired color blindness

19. How long should the patient be given to recognize the figure in a color plate?
white to white corneal diameter
2 to 3 seconds
rods
suspected acquired color defect

20. It is important to estimate the anterior chamber depth prior to dilation because...
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack
2 to 3 seconds
A-constant

21. Schirmer's test does not require _____ except Test strips
expensive equipment
narrow beam
patients who have had corneal refractive surgery
holding the probe perpendicular to the corneal surface

22. Schirmer's test I is used to measure...
before starting school
A Schirmer's test of 10 mm or more is considered normal.
ultrasound
reflex tears

23. Almost all of the formulas for calculating IOL power...
are based on the same general equation
shine the light flatly from the side - in the plane of the iris
desired postoperative refraction
IOL power

24. Color vision defects in children are frequently detected among those with...
can often be cured if the causative factor is eliminated
both eyes equally
reading disabilities
focus can he moved off-axis to obtain a clear reading

25. A TBUT of which of the following would indicate tear film dysfunction?
20
more males than females
expensive equipment
10 seconds

26. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
holding the probe perpendicular to the corneal surface
IOL power
patient wearing spectacles
desired postoperative refraction

27. Laser interferometry uses which type of laser light?
white to white corneal diameter
refractive error
remove the instrument from use
infrared

28. Which eye structure is responsible for color vision?
a malingerer may invent a number - thus identifying him- or herself
rods
A-constant
23 to 24 mm

29. Measuring corneal thickness via nonoptical pachymetry involves the use of...
pressing on the globe too hard with the probe
shortened axial length due to compression
IOL power
ultrasound

30. Glare testing is used to identify...
decrease in vision due to glare conditions
holding the probe perpendicular to the corneal surface
a narrow angle and bowed iris cast a shadow on the iris
23 to 24 mm

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
one-fourth
with the central cornea
reading disabilities
a malingerer may invent a number - thus identifying him- or herself

32. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
2.0 or more
refractive error
narrow beam

33. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
A Schirmer's test of 10 mm or more is considered normal.
one-fourth
with the central cornea

34. A rose bengal does not require the use of...
red - green - and blue
severe dry eye
refractive error
the cobalt blue filter

35. When performing a brightness acuity glare test - it is best to do which of the following?
differentiate between congenital or acquired color blindness
Allow the patient to adjust to the light level before reading the letters.
the use of an anesthetic
2.0 or more

36. Color vision testing is used to detect all of the following except...
corneal endothelial drop-out
the defect tends to remain stable over time
differentiate between congenital or acquired color blindness
0.3 mm

37. The photosensitive pigments of the eye are sensitive to...
narrow angles may precipitate an angle-closure glaucoma attack
before starting school
having them trace the number/figure
red - green - and blue

38. Hereditary color defects most often fall into which category?
the appearance of dry spots
to have little or no shadow
red-green
infrared

39. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
2.0 or more
is acceptable
desired postoperative refraction
more males than females

40. When should a child have his or her color vision checked?
a malingerer may invent a number - thus identifying him- or herself
is acceptable
before starting school
the use of an anesthetic

41. The ideal IOLMaster axial length graph is...
normal tearing
rods
IOL power
a tall - central spike with only one peak and smaller spikes on either site

42. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
both eyes equally
patients who have had corneal refractive surgery
dacryocystitis
IOL power

43. _______ are not used in evaluating tear break-up time (TBUT)
that the sound beam is directed to the optic disc and the measurement is incorrect
tear filter papers
refractive surgery
narrow beam

44. When positioning the IOLMaster for the axial length reading...
with the central cornea
2 to 3 seconds
focus can he moved off-axis to obtain a clear reading
narrow beam

45. One of the keys in accurate pachymetry is...
red-green
shortened axial length due to compression
holding the probe perpendicular to the corneal surface
central corneal thickness

46. Pachymetry readings are routinely taken prior to...
the appearance of dry spots
severe dry eye
refractive surgery
A-constant

47. If a biometry instrument fails to calibrate properly - one should...
shine the light flatly from the side - in the plane of the iris
5 minutes
remove the instrument from use
'test eye'

48. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
IOL power
10 seconds
infrared

49. 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)...
the patient is shown a sample that is discernable to normal and abnormal alike
A-constant
A Schirmer's test of 10 mm or more is considered normal.
a malingerer may invent a number - thus identifying him- or herself

50. A patient with which of the following potential diagnoses would be tested with bengal?
posterior subcapsular cataract
holding the probe perpendicular to the corneal surface
severe dry eye
varies according to the type of test