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 ideal IOLMaster axial length graph is...
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site
suspected acquired color defect
dacryocystitis

2. The Schirmer's test might be indicated in all of the following except...
decrease in vision due to glare conditions
to have little or no shadow
dacryocystitis
before starting school

3. Acquired color vision defects...
can often be cured if the causative factor is eliminated
narrow angles may precipitate an angle-closure glaucoma attack
to the left of the scleral and orbital echoes
2 to 3 seconds

4. The average central thickness of the human cornea is...
545 pm
for screening purposes - such as job applications
A-constant
remove the instrument from use

5. Schirmer's test II is used to measure...
one-fourth
normal tearing
pressing on the globe too hard with the probe
the defect tends to remain stable over time

6. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
expensive equipment
23 to 24 mm
are based on the same general equation

7. It is important to estimate the anterior chamber depth prior to dilation because...
more males than females
narrow angles may precipitate an angle-closure glaucoma attack
remove the instrument from use
A Schirmer's test of 10 mm or more is considered normal.

8. Rose bengal is...
shortened axial length due to compression
central corneal thickness
refractive surgery
a staining agent

9. Hereditary color defects most often fall into which category?
the patient should be tested with near correction - if worn
545 pm
severe dry eye
red-green

10. A color plate that shows no obvious number to normal and abnormal alike is useful because...
desired postoperative refraction
545 pm
a malingerer may invent a number - thus identifying him- or herself
A Schirmer's test of 10 mm or more is considered normal.

11. A rose bengal does not require the use of...
a staining agent
decrease in vision due to glare conditions
the cobalt blue filter
before starting school

12. Just prior to the beginning of the TBUT test - the patient is instructed to...
a narrow angle and bowed iris cast a shadow on the iris
before starting school
are based on the same general equation
blink

13. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
2.0 or more
to have little or no shadow
shine the light flatly from the side - in the plane of the iris
to the left of the scleral and orbital echoes

14. When calculating IOL power - each of the following are necessary except...
narrow angles may precipitate an angle-closure glaucoma attack
white to white corneal diameter
before starting school
patient wearing spectacles

15. The Ishihara color plates are useful...
for screening purposes - such as job applications
reading disabilities
narrow angles may precipitate an angle-closure glaucoma attack
to the left of the scleral and orbital echoes

16. 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)...
IOL power
before starting school
refractive error
A-constant

17. The difference between Schirmer's test I and II is...
refractive surgery
differentiate between congenital or acquired color blindness
central corneal thickness
the use of an anesthetic

18. 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?
both eyes equally
a staining agent
0.3 mm
is acceptable

19. When using a penlight to estimate anterior chamber depth - an open angle would appear...
corneal endothelial drop-out
narrow angles may precipitate an angle-closure glaucoma attack
a narrow angle and bowed iris cast a shadow on the iris
to have little or no shadow

20. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
both eyes equally
desired postoperative refraction
10 seconds

21. Illumination for the color plates test...
varies according to the type of test administered
corneal endothelial drop-out
both eyes equally
the patient should be tested with near correction - if worn

22. When should a child have his or her color vision checked?
before starting school
desired postoperative refraction
pressing on the globe too hard with the probe
2 to 3 seconds

23. _______ are not used in evaluating tear break-up time (TBUT)
reflex tears
'test eye'
tear filter papers
posterior subcapsular cataract

24. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
narrow angles may precipitate an angle-closure glaucoma attack
with the central cornea
normal tearing

25. If a biometry instrument fails to calibrate properly - one should...
ultrasound
pressing on the globe too hard with the probe
remove the instrument from use
refractive surgery

26. With the 1OLMaster - the ideal signal-to-noise ratio is...
the defect tends to remain stable over time
central corneal thickness
before starting school
2.0 or more

27. Color vision testing is used to detect all of the following except...
suspected acquired color defect
differentiate between congenital or acquired color blindness
refractive surgery
patient wearing spectacles

28. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
differentiate between congenital or acquired color blindness
is acceptable
severe dry eye
23 to 24 mm

29. Which of the following should be color-vision tested one eye at a time?
reflex tears
varies according to the type of test administered
suspected acquired color defect
both eyes equally

30. Measuring time for the Schirmer's test is...
the use of an anesthetic
severe dry eye
5 minutes
corneal endothelial drop-out

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

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32. Young children can be tested using the color plates by...
having them trace the number/figure
ultrasound
varies according to the type of test
to have little or no shadow

33. An A-Sean can he artificially shortened due to...
can often be cured if the causative factor is eliminated
shine the light flatly from the side - in the plane of the iris
patients who have had corneal refractive surgery
pressing on the globe too hard with the probe

34. Laser interferometry uses which type of laser light?
for screening purposes - such as job applications
a tall - central spike with only one peak and smaller spikes on either site
infrared
the patient is shown a sample that is discernable to normal and abnormal alike

35. Almost all of the formulas for calculating IOL power...
desired postoperative refraction
A-constant
are based on the same general equation
patient wearing spectacles

36. When using color plates - a score indicates abnormal color vision...
the appearance of dry spots
23 to 24 mm
a malingerer may invent a number - thus identifying him- or herself
varies according to the type of test

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

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38. 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...
posterior subcapsular cataract
infrared
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect

39. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
infrared
2.0 or more
the appearance of dry spots

40. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
3.0 D
reflex tears
reading disabilities
pressing on the globe too hard with the probe

41. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
remove the instrument from use
one-fourth
shine the light flatly from the side - in the plane of the iris

42. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
2 to 3 seconds
5 minutes
suspected acquired color defect
patients who have had corneal refractive surgery

43. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
severe dry eye
a malingerer may invent a number - thus identifying him- or herself
infrared
patient wearing spectacles

44. The axial length of the eye is important in the calculation of...
IOL power
patients who have had corneal refractive surgery
the defect tends to remain stable over time
white to white corneal diameter

45. Measuring corneal thickness via nonoptical pachymetry involves the use of...
tear filter papers
5 minutes
ultrasound
a staining agent

46. Glare testing is used to identify...
red-green
decrease in vision due to glare conditions
central corneal thickness
545 pm

47. In evaluating an axial length scan - the retinal echo must be...
23 to 24 mm
to the left of the scleral and orbital echoes
narrow beam
that the sound beam is directed to the optic disc and the measurement is incorrect

48. Hereditary color vision defects usually affect...
dacryocystitis
are based on the same general equation
pressing on the globe too hard with the probe
both eyes equally

49. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
the use of an anesthetic
patients who have had corneal refractive surgery
narrow beam
central corneal thickness

50. Pachymetry readings are routinely taken prior to...
refractive surgery
expensive equipment
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe