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. Just prior to the beginning of the TBUT test - the patient is instructed to...
normal tearing
blink
shortened axial length due to compression
dacryocystitis

2. Rose bengal is...
pressing on the globe too hard with the probe
reflex tears
a staining agent
central corneal thickness

3. A color plate that shows no obvious number to normal and abnormal alike is useful because...
IOL power
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
shine the light flatly from the side - in the plane of the iris

4. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
A Schirmer's test of 10 mm or more is considered normal.
a narrow angle and bowed iris cast a shadow on the iris
red - green - and blue

5. If a biometry instrument fails to calibrate properly - one should...
with the central cornea
remove the instrument from use
the patient is shown a sample that is discernable to normal and abnormal alike
545 pm

6. In which of the following would glare testing be most appropriate?
more males than females
varies according to the type of test administered
posterior subcapsular cataract
shine the light flatly from the side - in the plane of the iris

7. The difference between Schirmer's test I and II is...
the use of an anesthetic
that the sound beam is directed to the optic disc and the measurement is incorrect
remove the instrument from use
A-constant

8. Acquired color vision defects...
20
3.0 D
narrow angles may precipitate an angle-closure glaucoma attack
can often be cured if the causative factor is eliminated

9. A rose bengal does not require the use of...
the cobalt blue filter
patients who have had corneal refractive surgery
with the central cornea
reflex tears

10. 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
central corneal thickness
both eyes equally
the use of an anesthetic

11. Color vision testing is used to detect all of the following except...
posterior subcapsular cataract
refractive error
3.0 D
differentiate between congenital or acquired color blindness

12. Hereditary color vision defects usually affect...
are based on the same general equation
both eyes equally
can often be cured if the causative factor is eliminated
posterior subcapsular cataract

13. The IOLMaster eliminates which of the following sources of error?
10 seconds
shortened axial length due to compression
shine the light flatly from the side - in the plane of the iris
holding the probe perpendicular to the corneal surface

14. The Ishihara color plates are useful...
before starting school
for screening purposes - such as job applications
545 pm
0.3 mm

15. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
pressing on the globe too hard with the probe
3.0 D
is acceptable
more males than females

16. One of the keys in accurate pachymetry is...
with the central cornea
reading disabilities
are based on the same general equation
holding the probe perpendicular to the corneal surface

17. The photosensitive pigments of the eye are sensitive to...
suspected acquired color defect
10 seconds
red - green - and blue
rods

18. Schirmer's test does not require _____ except Test strips
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
narrow angles may precipitate an angle-closure glaucoma attack
expensive equipment

19. In evaluating an axial length scan - the retinal echo must be...
before starting school
to the left of the scleral and orbital echoes
a narrow angle and bowed iris cast a shadow on the iris
refractive error

20. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
patient wearing spectacles
differentiate between congenital or acquired color blindness
the patient should be tested with near correction - if worn

21. 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?
normal tearing
'test eye'
0.3 mm
rods

22. The Schirmer's test might be indicated in all of the following except...
the patient should be tested with near correction - if worn
dacryocystitis
20
reflex tears

23. Hereditary color vision defects affect...
shine the light flatly from the side - in the plane of the iris
more males than females
IOL power
pressing on the globe too hard with the probe

24. Schirmer's test II is used to measure...
3.0 D
normal tearing
decrease in vision due to glare conditions
IOL power

25. Almost all of the formulas for calculating IOL power...
a tall - central spike with only one peak and smaller spikes on either site
shortened axial length due to compression
expensive equipment
are based on the same general equation

26. When performing pachymetry prior to refractive surgery - it is generally best to begin...
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
a tall - central spike with only one peak and smaller spikes on either site
with the central cornea

27. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
normal tearing
can often be cured if the causative factor is eliminated
shortened axial length due to compression

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

29. Measuring time for the Schirmer's test is...
5 minutes
decrease in vision due to glare conditions
pressing on the globe too hard with the probe
the cobalt blue filter

30. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
remove the instrument from use
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green

31. The axial length of an average adult eye is...
corneal endothelial drop-out
shortened axial length due to compression
the appearance of dry spots
23 to 24 mm

32. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
severe dry eye
20
pressing on the globe too hard with the probe
one-fourth

33. In test a patient with the color pseudoisochromatic plates...
reading disabilities
the patient should be tested with near correction - if worn
having them trace the number/figure
with the central cornea

34. Before proceeding with the actual color plate test...
Allow the patient to adjust to the light level before reading the letters.
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
2.0 or more

35. The axial length of the eye is important in the calculation of...
for screening purposes - such as job applications
IOL power
the appearance of dry spots
normal tearing

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...
is acceptable
that the sound beam is directed to the optic disc and the measurement is incorrect
are based on the same general equation
before starting school

37. Color vision defects in children are frequently detected among those with...
varies according to the type of test administered
to the left of the scleral and orbital echoes
reading disabilities
blink

38. When using a penlight to estimate anterior chamber depth - an open angle would appear...
reading disabilities
to have little or no shadow
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect

39. The IOLMaster evaluates each of the following except...
refractive error
A Schirmer's test of 10 mm or more is considered normal.
normal tearing
refractive surgery

40. When calculating intraocular lens (IOL) powers - one must enter...
posterior subcapsular cataract
a malingerer may invent a number - thus identifying him- or herself
holding the probe perpendicular to the corneal surface
desired postoperative refraction

41. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
infrared
'test eye'
the appearance of dry spots

42. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
tear filter papers
A Schirmer's test of 10 mm or more is considered normal.
is acceptable
severe dry eye

43. Measuring corneal thickness via nonoptical pachymetry involves the use of...
white to white corneal diameter
with the central cornea
545 pm
ultrasound

44. With the 1OLMaster - the ideal signal-to-noise ratio is...
focus can he moved off-axis to obtain a clear reading
2.0 or more
the appearance of dry spots
varies according to the type of test administered

45. When calculating IOL power - each of the following are necessary except...
varies according to the type of test
white to white corneal diameter
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site

46. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
corneal endothelial drop-out
pressing on the globe too hard with the probe
red - green - and blue

47. An A-Sean can he artificially shortened due to...
5 minutes
pressing on the globe too hard with the probe
a malingerer may invent a number - thus identifying him- or herself
are based on the same general equation

48. Schirmer's test I is used to measure...
2 to 3 seconds
severe dry eye
to have little or no shadow
reflex tears

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

50. 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
more males than females
are based on the same general equation
with the central cornea