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. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
5 minutes
to the left of the scleral and orbital echoes
expensive equipment

2. When calculating IOL power - each of the following are necessary except...
remove the instrument from use
to have little or no shadow
white to white corneal diameter
holding the probe perpendicular to the corneal surface

3. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
can often be cured if the causative factor is eliminated
narrow angles may precipitate an angle-closure glaucoma attack
narrow beam
A Schirmer's test of 10 mm or more is considered normal.

4. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
to the left of the scleral and orbital echoes
shortened axial length due to compression
severe dry eye

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

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6. When using color plates - a score indicates abnormal color vision...
is acceptable
0.3 mm
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.

7. The Ishihara color plates are useful...
Allow the patient to adjust to the light level before reading the letters.
to the left of the scleral and orbital echoes
for screening purposes - such as job applications
white to white corneal diameter

8. 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
2 to 3 seconds
corneal endothelial drop-out
23 to 24 mm

9. Schirmer's test II is used to measure...
patients who have had corneal refractive surgery
IOL power
normal tearing
the cobalt blue filter

10. This is not evaluated using rose Bengal except...
severe dry eye
shine the light flatly from the side - in the plane of the iris
corneal endothelial drop-out
both eyes equally

11. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
expensive equipment
patients who have had corneal refractive surgery
dacryocystitis
the patient should be tested with near correction - if worn

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

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13. 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 malingerer may invent a number - thus identifying him- or herself
suspected acquired color defect
A-constant
patients who have had corneal refractive surgery

14. 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
refractive surgery
2 to 3 seconds

15. The average central thickness of the human cornea is...
545 pm
5 minutes
normal tearing
varies according to the type of test

16. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
a staining agent
3.0 D
red - green - and blue
a malingerer may invent a number - thus identifying him- or herself

17. Hereditary color defects most often fall into which category?
5 minutes
10 seconds
pressing on the globe too hard with the probe
red-green

18. Hereditary color vision defects affect...
more males than females
normal tearing
the patient is shown a sample that is discernable to normal and abnormal alike
desired postoperative refraction

19. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
tear filter papers
focus can he moved off-axis to obtain a clear reading
desired postoperative refraction

20. When calculating intraocular lens (IOL) powers - one must enter...
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable
decrease in vision due to glare conditions
desired postoperative refraction

21. The IOLMaster eliminates which of the following sources of error?
desired postoperative refraction
before starting school
shortened axial length due to compression
decrease in vision due to glare conditions

22. When should a child have his or her color vision checked?
pressing on the globe too hard with the probe
the appearance of dry spots
remove the instrument from use
before starting school

23. The ideal IOLMaster axial length graph is...
normal tearing
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis
infrared

24. With the 1OLMaster - the ideal signal-to-noise ratio is...
2 to 3 seconds
2.0 or more
'test eye'
a staining agent

25. When using a penlight to estimate anterior chamber depth - an open angle would appear...
patients who have had corneal refractive surgery
shine the light flatly from the side - in the plane of the iris
remove the instrument from use
to have little or no shadow

26. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
ultrasound
for screening purposes - such as job applications
the appearance of dry spots

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

28. A TBUT of which of the following would indicate tear film dysfunction?
remove the instrument from use
10 seconds
a staining agent
posterior subcapsular cataract

29. Glare testing is used to identify...
decrease in vision due to glare conditions
the appearance of dry spots
dacryocystitis
one-fourth

30. 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.
shine the light flatly from the side - in the plane of the iris
the appearance of dry spots
tear filter papers

31. If a biometry instrument fails to calibrate properly - one should...
focus can he moved off-axis to obtain a clear reading
shine the light flatly from the side - in the plane of the iris
rods
remove the instrument from use

32. Rose bengal is...
the use of an anesthetic
blink
a staining agent
corneal endothelial drop-out

33. Which of the following should be color-vision tested one eye at a time?
the patient should be tested with near correction - if worn
differentiate between congenital or acquired color blindness
suspected acquired color defect
severe dry eye

34. A rose bengal does not require the use of...
ultrasound
the appearance of dry spots
the cobalt blue filter
IOL power

35. Schirmer's test I is used to measure...
23 to 24 mm
reflex tears
holding the probe perpendicular to the corneal surface
the cobalt blue filter

36. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
to have little or no shadow
corneal endothelial drop-out
10 seconds

37. The difference between Schirmer's test I and II is...
with the central cornea
desired postoperative refraction
the use of an anesthetic
having them trace the number/figure

38. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
23 to 24 mm
red-green
posterior subcapsular cataract

39. When performing pachymetry prior to refractive surgery - it is generally best to begin...
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading
with the central cornea
desired postoperative refraction

40. The IOLMaster evaluates each of the following except...
refractive error
to the left of the scleral and orbital echoes
expensive equipment
2.0 or more

41. Acquired color vision defects...
that the sound beam is directed to the optic disc and the measurement is incorrect
20
can often be cured if the causative factor is eliminated
tear filter papers

42. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
refractive error
reading disabilities
red - green - and blue

43. The axial length of the eye is important in the calculation of...
Allow the patient to adjust to the light level before reading the letters.
5 minutes
IOL power
red - green - and blue

44. Which eye structure is responsible for color vision?
the appearance of dry spots
IOL power
shine the light flatly from the side - in the plane of the iris
rods

45. Laser interferometry uses which type of laser light?
the use of an anesthetic
infrared
central corneal thickness
before starting school

46. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
holding the probe perpendicular to the corneal surface
rods
2.0 or more

47. Young children can be tested using the color plates by...
a tall - central spike with only one peak and smaller spikes on either site
having them trace the number/figure
545 pm
varies according to the type of test

48. 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
with the central cornea
holding the probe perpendicular to the corneal surface
having them trace the number/figure

49. _______ are not used in evaluating tear break-up time (TBUT)
pressing on the globe too hard with the probe
varies according to the type of test administered
the appearance of dry spots
tear filter papers

50. Hereditary color vision defects usually affect...
a staining agent
both eyes equally
before starting school
rods