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 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?
one-fourth
Allow the patient to adjust to the light level before reading the letters.
A Schirmer's test of 10 mm or more is considered normal.
before starting school

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

3. When using a penlight to estimate anterior chamber depth - an open angle would appear...
the use of an anesthetic
20
to have little or no shadow
red - green - and blue

4. When performing a brightness acuity glare test - it is best to do which of the following?
3.0 D
reading disabilities
'test eye'
Allow the patient to adjust to the light level before reading the letters.

5. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
desired postoperative refraction
narrow beam
patients who have had corneal refractive surgery

6. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow angles may precipitate an angle-closure glaucoma attack
to the left of the scleral and orbital echoes
corneal endothelial drop-out
narrow beam

7. Pachymetry readings are routinely taken prior to...
is acceptable
2 to 3 seconds
0.3 mm
refractive surgery

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
blink
Allow the patient to adjust to the light level before reading the letters.
varies according to the type of test administered

9. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
focus can he moved off-axis to obtain a clear reading
is acceptable
shine the light flatly from the side - in the plane of the iris
posterior subcapsular cataract

10. If a biometry instrument fails to calibrate properly - one should...
dacryocystitis
20
tear filter papers
remove the instrument from use

11. The ideal IOLMaster axial length graph is...
a staining agent
3.0 D
a tall - central spike with only one peak and smaller spikes on either site
a narrow angle and bowed iris cast a shadow on the iris

12. The IOLMaster evaluates each of the following except...
refractive error
blink
more males than females
reading disabilities

13. Which of the following should be color-vision tested one eye at a time?
2.0 or more
shine the light flatly from the side - in the plane of the iris
suspected acquired color defect
shortened axial length due to compression

14. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
patient wearing spectacles
a narrow angle and bowed iris cast a shadow on the iris
refractive error

15. With the 1OLMaster - the ideal signal-to-noise ratio is...
the use of an anesthetic
dacryocystitis
rods
2.0 or more

16. When performing pachymetry prior to refractive surgery - it is generally best to begin...
for screening purposes - such as job applications
dacryocystitis
suspected acquired color defect
with the central cornea

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

18. Schirmer's test does not require _____ except Test strips
reflex tears
one-fourth
patients who have had corneal refractive surgery
expensive equipment

19. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
545 pm
3.0 D
A Schirmer's test of 10 mm or more is considered normal.
rods

20. Acquired color vision defects...
0.3 mm
varies according to the type of test administered
can often be cured if the causative factor is eliminated
with the central cornea

21. _______ are not used in evaluating tear break-up time (TBUT)
10 seconds
tear filter papers
expensive equipment
dacryocystitis

22. When calculating IOL power - each of the following are necessary except...
infrared
white to white corneal diameter
the cobalt blue filter
normal tearing

23. A rose bengal does not require the use of...
a tall - central spike with only one peak and smaller spikes on either site
both eyes equally
the cobalt blue filter
shine the light flatly from the side - in the plane of the iris

24. Hereditary color defects most often fall into which category?
reading disabilities
pressing on the globe too hard with the probe
red-green
red - green - and blue

25. Measuring corneal thickness via nonoptical pachymetry involves the use of...
23 to 24 mm
varies according to the type of test
ultrasound
20

26. It is important to estimate the anterior chamber depth prior to dilation because...
reading disabilities
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test administered
545 pm

27. The average central thickness of the human cornea is...
before starting school
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
545 pm

28. The axial length of an average adult eye is...
23 to 24 mm
2.0 or more
IOL power
red-green

29. Rose bengal is...
red-green
having them trace the number/figure
2 to 3 seconds
a staining agent

30. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
varies according to the type of test
the patient is shown a sample that is discernable to normal and abnormal alike
patient wearing spectacles

31. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
A-constant
one-fourth
red - green - and blue

32. 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
varies according to the type of test
can often be cured if the causative factor is eliminated
are based on the same general equation

33. Illumination for the color plates test...
varies according to the type of test administered
narrow beam
reading disabilities
expensive equipment

34. Young children can be tested using the color plates by...
tear filter papers
rods
the defect tends to remain stable over time
having them trace the number/figure

35. 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)...
the patient should be tested with near correction - if worn
2.0 or more
to have little or no shadow
A-constant

36. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
dacryocystitis
expensive equipment
decrease in vision due to glare conditions

37. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
is acceptable
holding the probe perpendicular to the corneal surface
0.3 mm

38. This is not evaluated using rose Bengal except...
refractive error
one-fourth
Allow the patient to adjust to the light level before reading the letters.
corneal endothelial drop-out

39. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
dacryocystitis
holding the probe perpendicular to the corneal surface
patients who have had corneal refractive surgery
focus can he moved off-axis to obtain a clear reading

40. The photosensitive pigments of the eye are sensitive to...
2.0 or more
decrease in vision due to glare conditions
to the left of the scleral and orbital echoes
red - green - and blue

41. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
pressing on the globe too hard with the probe
to the left of the scleral and orbital echoes
blink

42. The type of pachymetry used to evaluate a glaucoma suspect is...
refractive error
5 minutes
expensive equipment
central corneal thickness

43. Measuring time for the Schirmer's test is...
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test
5 minutes
the cobalt blue filter

44. In test a patient with the color pseudoisochromatic plates...
20
the patient should be tested with near correction - if worn
remove the instrument from use
reflex tears

45. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
dacryocystitis
the patient is shown a sample that is discernable to normal and abnormal alike
3.0 D
20

46. Schirmer's test I is used to measure...
the patient should be tested with near correction - if worn
reflex tears
infrared
0.3 mm

47. When positioning the IOLMaster for the axial length reading...
infrared
before starting school
'test eye'
focus can he moved off-axis to obtain a clear reading

48. When should a child have his or her color vision checked?
varies according to the type of test administered
'test eye'
before starting school
rods

49. 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?
infrared
narrow angles may precipitate an angle-closure glaucoma attack
refractive surgery
0.3 mm

50. Color vision defects in children are frequently detected among those with...
narrow angles may precipitate an angle-closure glaucoma attack
reading disabilities
A-constant
that the sound beam is directed to the optic disc and the measurement is incorrect