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 difference between Schirmer's test I and II is...
the use of an anesthetic
red - green - and blue
545 pm
patient wearing spectacles

2. The ideal IOLMaster axial length graph is...
the patient is shown a sample that is discernable to normal and abnormal alike
a tall - central spike with only one peak and smaller spikes on either site
'test eye'
red - green - and blue

3. Schirmer's test II is used to measure...
20
A-constant
'test eye'
normal tearing

4. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
one-fourth
Allow the patient to adjust to the light level before reading the letters.
23 to 24 mm

5. Measuring time for the Schirmer's test is...
5 minutes
2 to 3 seconds
shine the light flatly from the side - in the plane of the iris
differentiate between congenital or acquired color blindness

6. When performing a brightness acuity glare test - it is best to do which of the following?
expensive equipment
a tall - central spike with only one peak and smaller spikes on either site
Allow the patient to adjust to the light level before reading the letters.
patients who have had corneal refractive surgery

7. In test a patient with the color pseudoisochromatic plates...
before starting school
10 seconds
white to white corneal diameter
the patient should be tested with near correction - if worn

8. The type of pachymetry used to evaluate a glaucoma suspect is...
a tall - central spike with only one peak and smaller spikes on either site
holding the probe perpendicular to the corneal surface
central corneal thickness
remove the instrument from use

9. When using color plates - a score indicates abnormal color vision...
severe dry eye
pressing on the globe too hard with the probe
varies according to the type of test
corneal endothelial drop-out

10. It is important to estimate the anterior chamber depth prior to dilation because...
a tall - central spike with only one peak and smaller spikes on either site
A Schirmer's test of 10 mm or more is considered normal.
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally

11. The average central thickness of the human cornea is...
shine the light flatly from the side - in the plane of the iris
545 pm
decrease in vision due to glare conditions
2 to 3 seconds

12. Just prior to the beginning of the TBUT test - the patient is instructed to...
refractive error
patient wearing spectacles
blink
IOL power

13. Which eye structure is responsible for color vision?
shine the light flatly from the side - in the plane of the iris
rods
Allow the patient to adjust to the light level before reading the letters.
before starting school

14. Almost all of the formulas for calculating IOL power...
'test eye'
are based on the same general equation
normal tearing
holding the probe perpendicular to the corneal surface

15. _______ are not used in evaluating tear break-up time (TBUT)
20
refractive error
tear filter papers
focus can he moved off-axis to obtain a clear reading

16. When calculating IOL power - each of the following are necessary except...
5 minutes
the use of an anesthetic
focus can he moved off-axis to obtain a clear reading
white to white corneal diameter

17. Hereditary color vision defects affect...
before starting school
more males than females
red-green
infrared

18. One of the keys in accurate pachymetry is...
central corneal thickness
more males than females
IOL power
holding the probe perpendicular to the corneal surface

19. In evaluating an axial length scan - the retinal echo must be...
pressing on the globe too hard with the probe
to the left of the scleral and orbital echoes
red - green - and blue
before starting school

20. Measuring corneal thickness via nonoptical pachymetry involves the use of...
expensive equipment
a narrow angle and bowed iris cast a shadow on the iris
ultrasound
differentiate between congenital or acquired color blindness

21. Laser interferometry uses which type of laser light?
'test eye'
infrared
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack

22. A TBUT of which of the following would indicate tear film dysfunction?
patients who have had corneal refractive surgery
10 seconds
before starting school
a narrow angle and bowed iris cast a shadow on the iris

23. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
can often be cured if the causative factor is eliminated
patients who have had corneal refractive surgery
tear filter papers

24. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
a malingerer may invent a number - thus identifying him- or herself
expensive equipment
remove the instrument from use

25. The Ishihara color plates are useful...
normal tearing
for screening purposes - such as job applications
the defect tends to remain stable over time
A Schirmer's test of 10 mm or more is considered normal.

26. When should a child have his or her color vision checked?
'test eye'
blink
before starting school
dacryocystitis

27. Glare testing is used to identify...
red - green - and blue
a staining agent
the appearance of dry spots
decrease in vision due to glare conditions

28. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
shortened axial length due to compression
545 pm
3.0 D

29. When performing the TBUT test - the observer is looking for...
central corneal thickness
narrow angles may precipitate an angle-closure glaucoma attack
red-green
the appearance of dry spots

30. Schirmer's test does not require _____ except Test strips
expensive equipment
3.0 D
pressing on the globe too hard with the probe
reading disabilities

31. A patient with which of the following potential diagnoses would be tested with bengal?
remove the instrument from use
corneal endothelial drop-out
a staining agent
severe dry eye

32. Schirmer's test I is used to measure...
20
a malingerer may invent a number - thus identifying him- or herself
reflex tears
rods

33. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
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
are based on the same general equation
normal tearing

34. The IOLMaster evaluates each of the following except...
10 seconds
refractive error
dacryocystitis
a narrow angle and bowed iris cast a shadow on the iris

35. Estimating the anterior chamber depth with a penlight works because...
normal tearing
red-green
a narrow angle and bowed iris cast a shadow on the iris
5 minutes

36. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
red-green
A-constant
a staining agent

37. In which of the following would glare testing be most appropriate?
0.3 mm
can often be cured if the causative factor is eliminated
decrease in vision due to glare conditions
posterior subcapsular cataract

38. Pachymetry readings are routinely taken prior to...
ultrasound
refractive surgery
more males than females
reading disabilities

39. Hereditary color vision defects usually affect...
with the central cornea
expensive equipment
the defect tends to remain stable over time
both eyes equally

40. Rose bengal is...
the use of an anesthetic
decrease in vision due to glare conditions
a staining agent
23 to 24 mm

41. Before proceeding with the actual color plate test...
tear filter papers
the patient is shown a sample that is discernable to normal and abnormal alike
desired postoperative refraction
posterior subcapsular cataract

42. Acquired color vision defects...
can often be cured if the causative factor is eliminated
patients who have had corneal refractive surgery
3.0 D
tear filter papers

43. When performing pachymetry prior to refractive surgery - it is generally best to begin...
0.3 mm
severe dry eye
with the central cornea
3.0 D

44. 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?
0.3 mm
focus can he moved off-axis to obtain a clear reading
a tall - central spike with only one peak and smaller spikes on either site
narrow beam

45. 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)...
having them trace the number/figure
posterior subcapsular cataract
to the left of the scleral and orbital echoes
A-constant

46. The IOLMaster eliminates which of the following sources of error?
differentiate between congenital or acquired color blindness
2.0 or more
both eyes equally
shortened axial length due to compression

47. The axial length of the eye is important in the calculation of...
to have little or no shadow
3.0 D
refractive surgery
IOL power

48. Illumination for the color plates test...
posterior subcapsular cataract
central corneal thickness
red - green - and blue
varies according to the type of test administered

49. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
Allow the patient to adjust to the light level before reading the letters.
20
the cobalt blue filter

50. Which of the following should be color-vision tested one eye at a time?
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
the defect tends to remain stable over time
reading disabilities