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...
narrow angles may precipitate an angle-closure glaucoma attack
blink
A-constant
2.0 or more

2. The IOLMaster evaluates each of the following except...
refractive error
narrow beam
with the central cornea
patient wearing spectacles

3. Acquired color vision defects...
IOL power
patient wearing spectacles
can often be cured if the causative factor is eliminated
rods

4. 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
A-constant
blink
before starting school

5. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
a malingerer may invent a number - thus identifying him- or herself
the defect tends to remain stable over time
a narrow angle and bowed iris cast a shadow on the iris

6. The Schirmer's test might be indicated in all of the following except...
varies according to the type of test
infrared
2.0 or more
dacryocystitis

7. Schirmer's test does not require _____ except Test strips
central corneal thickness
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
patients who have had corneal refractive surgery

8. When should a child have his or her color vision checked?
before starting school
severe dry eye
a malingerer may invent a number - thus identifying him- or herself
ultrasound

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

10. Glare testing is used to identify...
reflex tears
to the left of the scleral and orbital echoes
Allow the patient to adjust to the light level before reading the letters.
decrease in vision due to glare conditions

11. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
20
refractive surgery
reading disabilities
patients who have had corneal refractive surgery

12. How long should the patient be given to recognize the figure in a color plate?
the use of an anesthetic
2 to 3 seconds
tear filter papers
differentiate between congenital or acquired color blindness

13. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
545 pm
before starting school
remove the instrument from use

14. An A-Sean can he artificially shortened due to...
tear filter papers
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
20

15. Schirmer's test I is used to measure...
3.0 D
remove the instrument from use
reflex tears
the cobalt blue filter

16. _______ are not used in evaluating tear break-up time (TBUT)
shine the light flatly from the side - in the plane of the iris
holding the probe perpendicular to the corneal surface
decrease in vision due to glare conditions
tear filter papers

17. The axial length of an average adult eye is...
A Schirmer's test of 10 mm or more is considered normal.
having them trace the number/figure
before starting school
23 to 24 mm

18. When performing a brightness acuity glare test - it is best to do which of the following?
red - green - and blue
'test eye'
are based on the same general equation
Allow the patient to adjust to the light level before reading the letters.

19. Illumination for the color plates test...
expensive equipment
varies according to the type of test administered
narrow beam
2.0 or more

20. When using a penlight to estimate anterior chamber depth - an open angle would appear...
desired postoperative refraction
white to white corneal diameter
to have little or no shadow
23 to 24 mm

21. Laser interferometry uses which type of laser light?
Allow the patient to adjust to the light level before reading the letters.
holding the probe perpendicular to the corneal surface
red - green - and blue
infrared

22. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
red - green - and blue
'test eye'
narrow beam
3.0 D

23. 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
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
infrared

24. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
20
to the left of the scleral and orbital echoes
narrow angles may precipitate an angle-closure glaucoma attack

25. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
0.3 mm
patient wearing spectacles
having them trace the number/figure
decrease in vision due to glare conditions

26. In evaluating an axial length scan - the retinal echo must be...
varies according to the type of test
3.0 D
to the left of the scleral and orbital echoes
shortened axial length due to compression

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

28. 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?
corneal endothelial drop-out
expensive equipment
one-fourth
remove the instrument from use

29. Color vision defects in children are frequently detected among those with...
pressing on the globe too hard with the probe
reading disabilities
varies according to the type of test administered
suspected acquired color defect

30. The photosensitive pigments of the eye are sensitive to...
23 to 24 mm
red - green - and blue
refractive surgery
the defect tends to remain stable over time

31. The ideal IOLMaster axial length graph is...
tear filter papers
a malingerer may invent a number - thus identifying him- or herself
a tall - central spike with only one peak and smaller spikes on either site
a staining agent

32. Almost all of the formulas for calculating IOL power...
refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack
infrared
are based on the same general equation

33. Estimating the anterior chamber depth with a penlight works because...
focus can he moved off-axis to obtain a clear reading
a narrow angle and bowed iris cast a shadow on the iris
white to white corneal diameter
with the central cornea

34. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
infrared
dacryocystitis
the cobalt blue filter

35. Measuring corneal thickness via nonoptical pachymetry involves the use of...
severe dry eye
the cobalt blue filter
ultrasound
patient wearing spectacles

36. Before proceeding with the actual color plate test...
IOL power
the patient is shown a sample that is discernable to normal and abnormal alike
'test eye'
tear filter papers

37. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
tear filter papers
pressing on the globe too hard with the probe
reading disabilities
the defect tends to remain stable over time

38. 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?
decrease in vision due to glare conditions
0.3 mm
is acceptable
corneal endothelial drop-out

39. Hereditary color defects most often fall into which category?
narrow beam
23 to 24 mm
red-green
tear filter papers

40. 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
a tall - central spike with only one peak and smaller spikes on either site
the appearance of dry spots
varies according to the type of test

41. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
remove the instrument from use
are based on the same general equation
20

42. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
infrared
the appearance of dry spots
normal tearing

43. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
posterior subcapsular cataract
expensive equipment
red-green

44. When calculating IOL power - each of the following are necessary except...
severe dry eye
5 minutes
rods
white to white corneal diameter

45. 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
IOL power
posterior subcapsular cataract
are based on the same general equation

46. Hereditary color vision defects usually affect...
is acceptable
red - green - and blue
tear filter papers
both eyes equally

47. Rose bengal is...
a staining agent
remove the instrument from use
focus can he moved off-axis to obtain a clear reading
refractive error

48. Pachymetry readings are routinely taken prior to...
23 to 24 mm
refractive surgery
normal tearing
is acceptable

49. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
a staining agent
blink
before starting school

50. The difference between Schirmer's test I and II is...
IOL power
severe dry eye
the use of an anesthetic
suspected acquired color defect