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. 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)...
expensive equipment
A-constant
varies according to the type of test administered
dacryocystitis

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

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3. Measuring time for the Schirmer's test is...
5 minutes
red - green - and blue
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

4. Schirmer's test II is used to measure...
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
normal tearing
can often be cured if the causative factor is eliminated

5. Before proceeding with the actual color plate test...
the appearance of dry spots
narrow beam
patient wearing spectacles
the patient is shown a sample that is discernable to normal and abnormal alike

6. How long should the patient be given to recognize the figure in a color plate?
the patient is shown a sample that is discernable to normal and abnormal alike
expensive equipment
the appearance of dry spots
2 to 3 seconds

7. The IOLMaster eliminates which of the following sources of error?
10 seconds
shortened axial length due to compression
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself

8. Schirmer's test does not require _____ except Test strips
infrared
desired postoperative refraction
more males than females
expensive equipment

9. When positioning the IOLMaster for the axial length reading...
'test eye'
focus can he moved off-axis to obtain a clear reading
are based on the same general equation
IOL power

10. Schirmer's test I is used to measure...
desired postoperative refraction
for screening purposes - such as job applications
reflex tears
both eyes equally

11. Young children can be tested using the color plates by...
refractive surgery
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
white to white corneal diameter

12. 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...
2 to 3 seconds
to the left of the scleral and orbital echoes
that the sound beam is directed to the optic disc and the measurement is incorrect
can often be cured if the causative factor is eliminated

13. The Schirmer's test might be indicated in all of the following except...
holding the probe perpendicular to the corneal surface
the patient should be tested with near correction - if worn
545 pm
dacryocystitis

14. The axial length of an average adult eye is...
23 to 24 mm
infrared
5 minutes
white to white corneal diameter

15. With the 1OLMaster - the ideal signal-to-noise ratio is...
normal tearing
refractive surgery
2.0 or more
a narrow angle and bowed iris cast a shadow on the iris

16. Hereditary color vision defects usually affect...
both eyes equally
red-green
'test eye'
A-constant

17. Hereditary color defects most often fall into which category?
white to white corneal diameter
20
red-green
expensive equipment

18. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
rods
the cobalt blue filter
both eyes equally

19. The photosensitive pigments of the eye are sensitive to...
narrow angles may precipitate an angle-closure glaucoma attack
5 minutes
red - green - and blue
the patient is shown a sample that is discernable to normal and abnormal alike

20. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
pressing on the globe too hard with the probe
Allow the patient to adjust to the light level before reading the letters.
is acceptable
20

21. Measuring corneal thickness via nonoptical pachymetry involves the use of...
10 seconds
with the central cornea
is acceptable
ultrasound

22. Color vision testing is used to detect all of the following except...
blink
severe dry eye
differentiate between congenital or acquired color blindness
0.3 mm

23. Estimating the anterior chamber depth with a penlight works because...
remove the instrument from use
a narrow angle and bowed iris cast a shadow on the iris
varies according to the type of test
a staining agent

24. A TBUT of which of the following would indicate tear film dysfunction?
pressing on the globe too hard with the probe
before starting school
that the sound beam is directed to the optic disc and the measurement is incorrect
10 seconds

25. The IOLMaster evaluates each of the following except...
20
refractive error
to the left of the scleral and orbital echoes
decrease in vision due to glare conditions

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

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27. The axial length of the eye is important in the calculation of...
the cobalt blue filter
is acceptable
both eyes equally
IOL power

28. Which eye structure is responsible for color vision?
before starting school
reflex tears
5 minutes
rods

29. When should a child have his or her color vision checked?
before starting school
dacryocystitis
a tall - central spike with only one peak and smaller spikes on either site
that the sound beam is directed to the optic disc and the measurement is incorrect

30. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
before starting school
patient wearing spectacles
IOL power
shine the light flatly from the side - in the plane of the iris

31. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
rods
a staining agent
the defect tends to remain stable over time
holding the probe perpendicular to the corneal surface

32. The average central thickness of the human cornea is...
differentiate between congenital or acquired color blindness
central corneal thickness
545 pm
23 to 24 mm

33. When performing the TBUT test - the observer is looking for...
A Schirmer's test of 10 mm or more is considered normal.
can often be cured if the causative factor is eliminated
the appearance of dry spots
desired postoperative refraction

34. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
patient wearing spectacles
3.0 D
the defect tends to remain stable over time
is acceptable

35. 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
more males than females
for screening purposes - such as job applications
before starting school

36. In evaluating an axial length scan - the retinal echo must be...
white to white corneal diameter
narrow angles may precipitate an angle-closure glaucoma attack
to the left of the scleral and orbital echoes
A Schirmer's test of 10 mm or more is considered normal.

37. Laser interferometry uses which type of laser light?
A Schirmer's test of 10 mm or more is considered normal.
infrared
545 pm
central corneal thickness

38. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
varies according to the type of test
varies according to the type of test administered
5 minutes

39. 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?
varies according to the type of test administered
severe dry eye
one-fourth
reading disabilities

40. The difference between Schirmer's test I and II is...
severe dry eye
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression
the use of an anesthetic

41. When using color plates - a score indicates abnormal color vision...
Allow the patient to adjust to the light level before reading the letters.
varies according to the type of test
that the sound beam is directed to the optic disc and the measurement is incorrect
suspected acquired color defect

42. The ideal IOLMaster axial length graph is...
A Schirmer's test of 10 mm or more is considered normal.
23 to 24 mm
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

43. In which of the following would glare testing be most appropriate?
with the central cornea
posterior subcapsular cataract
severe dry eye
the cobalt blue filter

44. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
shine the light flatly from the side - in the plane of the iris
white to white corneal diameter
the patient is shown a sample that is discernable to normal and abnormal alike

45. Rose bengal is...
focus can he moved off-axis to obtain a clear reading
more males than females
0.3 mm
a staining agent

46. Acquired color vision defects...
can often be cured if the causative factor is eliminated
tear filter papers
corneal endothelial drop-out
the defect tends to remain stable over time

47. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
IOL power
20
varies according to the type of test administered
the use of an anesthetic

48. When performing a brightness acuity glare test - it is best to do which of the following?
Allow the patient to adjust to the light level before reading the letters.
tear filter papers
one-fourth
for screening purposes - such as job applications

49. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
shortened axial length due to compression
red - green - and blue
10 seconds

50. Illumination for the color plates test...
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test administered
one-fourth