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. Glare testing is used to identify...
blink
decrease in vision due to glare conditions
the cobalt blue filter
for screening purposes - such as job applications

2. A color plate that shows no obvious number to normal and abnormal alike is useful because...
tear filter papers
A-constant
severe dry eye
a malingerer may invent a number - thus identifying him- or herself

3. Before proceeding with the actual color plate test...
focus can he moved off-axis to obtain a clear reading
the patient is shown a sample that is discernable to normal and abnormal alike
before starting school
3.0 D

4. Illumination for the color plates test...
a narrow angle and bowed iris cast a shadow on the iris
can often be cured if the causative factor is eliminated
varies according to the type of test administered
a staining agent

5. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
narrow beam
the defect tends to remain stable over time
a tall - central spike with only one peak and smaller spikes on either site
the patient should be tested with near correction - if worn

6. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
focus can he moved off-axis to obtain a clear reading
545 pm
desired postoperative refraction

7. When performing a brightness acuity glare test - it is best to do which of the following?
to have little or no shadow
shortened axial length due to compression
Allow the patient to adjust to the light level before reading the letters.
A-constant

8. Acquired color vision defects...
can often be cured if the causative factor is eliminated
'test eye'
3.0 D
patient wearing spectacles

9. When performing the TBUT test - the observer is looking for...
reflex tears
desired postoperative refraction
narrow angles may precipitate an angle-closure glaucoma attack
the appearance of dry spots

10. 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
normal tearing
2 to 3 seconds
are based on the same general equation

11. 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?
20
0.3 mm
both eyes equally
shortened axial length due to compression

12. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
severe dry eye
dacryocystitis
A-constant

13. Which of the following should be color-vision tested one eye at a time?
severe dry eye
suspected acquired color defect
10 seconds
rods

14. Pachymetry readings are routinely taken prior to...
tear filter papers
holding the probe perpendicular to the corneal surface
a malingerer may invent a number - thus identifying him- or herself
refractive surgery

15. In which of the following would glare testing be most appropriate?
the use of an anesthetic
545 pm
corneal endothelial drop-out
posterior subcapsular cataract

16. A patient with which of the following potential diagnoses would be tested with bengal?
dacryocystitis
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye
tear filter papers

17. Hereditary color defects most often fall into which category?
the use of an anesthetic
that the sound beam is directed to the optic disc and the measurement is incorrect
20
red-green

18. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
'test eye'
narrow angles may precipitate an angle-closure glaucoma attack
5 minutes

19. Schirmer's test I is used to measure...
refractive error
suspected acquired color defect
is acceptable
reflex tears

20. When using a penlight to estimate anterior chamber depth - an open angle would appear...
both eyes equally
reading disabilities
shine the light flatly from the side - in the plane of the iris
to have little or no shadow

21. 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)...
both eyes equally
20
A-constant
to have little or no shadow

22. Color vision defects in children are frequently detected among those with...
reading disabilities
varies according to the type of test administered
more males than females
the patient is shown a sample that is discernable to normal and abnormal alike

23. 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 Schirmer's test of 10 mm or more is considered normal.
varies according to the type of test administered
differentiate between congenital or acquired color blindness

24. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
normal tearing
20
shortened axial length due to compression
varies according to the type of test administered

25. 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.
3.0 D
tear filter papers

26. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
refractive error
a staining agent
red-green

27. When calculating intraocular lens (IOL) powers - one must enter...
focus can he moved off-axis to obtain a clear reading
A Schirmer's test of 10 mm or more is considered normal.
desired postoperative refraction
2 to 3 seconds

28. Measuring time for the Schirmer's test is...
the patient should be tested with near correction - if worn
shortened axial length due to compression
5 minutes
corneal endothelial drop-out

29. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the defect tends to remain stable over time
3.0 D
focus can he moved off-axis to obtain a clear reading
the cobalt blue filter

30. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
varies according to the type of test
varies according to the type of test administered
patient wearing spectacles
infrared

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
20
to the left of the scleral and orbital echoes
central corneal thickness

32. The axial length of the eye is important in the calculation of...
rods
IOL power
desired postoperative refraction
A Schirmer's test of 10 mm or more is considered normal.

33. Laser interferometry uses which type of laser light?
more males than females
before starting school
infrared
both eyes equally

34. 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?
remove the instrument from use
the defect tends to remain stable over time
one-fourth
both eyes equally

35. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the defect tends to remain stable over time
patients who have had corneal refractive surgery
A-constant
refractive surgery

36. The photosensitive pigments of the eye are sensitive to...
the patient should be tested with near correction - if worn
blink
red - green - and blue
severe dry eye

37. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
545 pm
the patient should be tested with near correction - if worn
the use of an anesthetic

38. The difference between Schirmer's test I and II is...
the use of an anesthetic
differentiate between congenital or acquired color blindness
that the sound beam is directed to the optic disc and the measurement is incorrect
2 to 3 seconds

39. When calculating IOL power - each of the following are necessary except...
posterior subcapsular cataract
ultrasound
3.0 D
white to white corneal diameter

40. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
0.3 mm
desired postoperative refraction
A Schirmer's test of 10 mm or more is considered normal.

41. Hereditary color vision defects affect...
more males than females
posterior subcapsular cataract
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

42. The IOLMaster eliminates which of the following sources of error?
a staining agent
blink
shortened axial length due to compression
the cobalt blue filter

43. A rose bengal does not require the use of...
severe dry eye
to the left of the scleral and orbital echoes
the cobalt blue filter
the use of an anesthetic

44. An A-Sean can he artificially shortened due to...
narrow beam
a narrow angle and bowed iris cast a shadow on the iris
holding the probe perpendicular to the corneal surface
pressing on the globe too hard with the probe

45. Schirmer's test does not require _____ except Test strips
expensive equipment
23 to 24 mm
refractive error
decrease in vision due to glare conditions

46. With the 1OLMaster - the ideal signal-to-noise ratio is...
23 to 24 mm
0.3 mm
2.0 or more
the patient should be tested with near correction - if worn

47. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
Allow the patient to adjust to the light level before reading the letters.
both eyes equally
the use of an anesthetic

48. This is not evaluated using rose Bengal except...
pressing on the globe too hard with the probe
reflex tears
is acceptable
corneal endothelial drop-out

49. A TBUT of which of the following would indicate tear film dysfunction?
shortened axial length due to compression
reflex tears
545 pm
10 seconds

50. Almost all of the formulas for calculating IOL power...
shine the light flatly from the side - in the plane of the iris
3.0 D
are based on the same general equation
patient wearing spectacles