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 IOLMaster must be calibrated daily using a...

2. Hereditary color vision defects usually affect...
infrared
both eyes equally
'test eye'
the appearance of dry spots

3. Schirmer's test does not require _____ except Test strips
the cobalt blue filter
IOL power
one-fourth
expensive equipment

4. How long should the patient be given to recognize the figure in a color plate?
patients who have had corneal refractive surgery
2 to 3 seconds
3.0 D
dacryocystitis

5. 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)...
ultrasound
for screening purposes - such as job applications
pressing on the globe too hard with the probe
A-constant

6. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
A-constant
a staining agent
0.3 mm

7. Hereditary color vision defects affect...
A-constant
normal tearing
suspected acquired color defect
more males than females

8. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
5 minutes
0.3 mm
holding the probe perpendicular to the corneal surface

9. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
suspected acquired color defect
central corneal thickness
3.0 D
are based on the same general equation

10. Estimating the anterior chamber depth with a penlight works because...
before starting school
can often be cured if the causative factor is eliminated
a narrow angle and bowed iris cast a shadow on the iris
that the sound beam is directed to the optic disc and the measurement is incorrect

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

12. When using a penlight to estimate anterior chamber depth - an open angle would appear...
10 seconds
to have little or no shadow
posterior subcapsular cataract
A-constant

13. It is important to estimate the anterior chamber depth prior to dilation because...
with the central cornea
narrow angles may precipitate an angle-closure glaucoma attack
the cobalt blue filter
decrease in vision due to glare conditions

14. When using color plates - a score indicates abnormal color vision...
10 seconds
to the left of the scleral and orbital echoes
varies according to the type of test
blink

15. When performing a brightness acuity glare test - it is best to do which of the following?
more males than females
varies according to the type of test
reading disabilities
Allow the patient to adjust to the light level before reading the letters.

16. Schirmer's test II is used to measure...
corneal endothelial drop-out
tear filter papers
normal tearing
a tall - central spike with only one peak and smaller spikes on either site

17. One of the keys in accurate pachymetry is...
is acceptable
holding the probe perpendicular to the corneal surface
varies according to the type of test administered
blink

18. Which eye structure is responsible for color vision?
5 minutes
central corneal thickness
rods
a staining agent

19. Almost all of the formulas for calculating IOL power...
before starting school
posterior subcapsular cataract
2.0 or more
are based on the same general equation

20. The ideal IOLMaster axial length graph is...
infrared
a tall - central spike with only one peak and smaller spikes on either site
having them trace the number/figure
IOL power

21. Before proceeding with the actual color plate test...
reflex tears
the patient is shown a sample that is discernable to normal and abnormal alike
Allow the patient to adjust to the light level before reading the letters.
10 seconds

22. Illumination for the color plates test...
the patient should be tested with near correction - if worn
refractive error
10 seconds
varies according to the type of test administered

23. Rose bengal is...
both eyes equally
one-fourth
the cobalt blue filter
a staining agent

24. With the 1OLMaster - the ideal signal-to-noise ratio is...
corneal endothelial drop-out
reading disabilities
before starting school
2.0 or more

25. Measuring time for the Schirmer's test is...
central corneal thickness
3.0 D
remove the instrument from use
5 minutes

26. The IOLMaster eliminates which of the following sources of error?
patients who have had corneal refractive surgery
shortened axial length due to compression
reading disabilities
both eyes equally

27. Color vision defects in children are frequently detected among those with...
corneal endothelial drop-out
shortened axial length due to compression
before starting school
reading disabilities

28. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
shine the light flatly from the side - in the plane of the iris
Allow the patient to adjust to the light level before reading the letters.
20
expensive equipment

29. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack
patients who have had corneal refractive surgery
5 minutes

30. The IOLMaster evaluates each of the following except...
focus can he moved off-axis to obtain a clear reading
remove the instrument from use
refractive error
having them trace the number/figure

31. Measuring corneal thickness via nonoptical pachymetry involves the use of...
narrow beam
5 minutes
to have little or no shadow
ultrasound

32. When performing the TBUT test - the observer is looking for...
the patient is shown a sample that is discernable to normal and abnormal alike
corneal endothelial drop-out
the appearance of dry spots
Allow the patient to adjust to the light level before reading the letters.

33. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
reading disabilities
posterior subcapsular cataract
the defect tends to remain stable over time
dacryocystitis

34. Young children can be tested using the color plates by...
Allow the patient to adjust to the light level before reading the letters.
differentiate between congenital or acquired color blindness
having them trace the number/figure
decrease in vision due to glare conditions

35. The photosensitive pigments of the eye are sensitive to...
pressing on the globe too hard with the probe
that the sound beam is directed to the optic disc and the measurement is incorrect
the patient is shown a sample that is discernable to normal and abnormal alike
red - green - and blue

36. 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?
A Schirmer's test of 10 mm or more is considered normal.
narrow beam
one-fourth
are based on the same general equation

37. Acquired color vision defects...
severe dry eye
the appearance of dry spots
remove the instrument from use
can often be cured if the causative factor is eliminated

38. Hereditary color defects most often fall into which category?
varies according to the type of test administered
tear filter papers
patient wearing spectacles
red-green

39. The axial length of an average adult eye is...
remove the instrument from use
ultrasound
for screening purposes - such as job applications
23 to 24 mm

40. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris
varies according to the type of test administered
IOL power

41. The Ishihara color plates are useful...
for screening purposes - such as job applications
the use of an anesthetic
IOL power
a staining agent

42. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
infrared
expensive equipment
refractive surgery
shine the light flatly from the side - in the plane of the iris

43. 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
remove the instrument from use
A Schirmer's test of 10 mm or more is considered normal.
are based on the same general equation

44. The average central thickness of the human cornea is...
a malingerer may invent a number - thus identifying him- or herself
IOL power
545 pm
focus can he moved off-axis to obtain a clear reading

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

46. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
reflex tears
holding the probe perpendicular to the corneal surface
A-constant

47. Laser interferometry uses which type of laser light?
focus can he moved off-axis to obtain a clear reading
white to white corneal diameter
0.3 mm
infrared

48. 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?
more males than females
0.3 mm
decrease in vision due to glare conditions
patient wearing spectacles

49. 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...
that the sound beam is directed to the optic disc and the measurement is incorrect
dacryocystitis
suspected acquired color defect
patient wearing spectacles

50. The axial length of the eye is important in the calculation of...
2.0 or more
infrared
IOL power
blink