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...
to have little or no shadow
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis
5 minutes

2. Young children can be tested using the color plates by...
more males than females
having them trace the number/figure
the use of an anesthetic
the defect tends to remain stable over time

3. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
Allow the patient to adjust to the light level before reading the letters.
the cobalt blue filter
infrared

4. A rose bengal does not require the use of...
the cobalt blue filter
ultrasound
Allow the patient to adjust to the light level before reading the letters.
2.0 or more

5. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
are based on the same general equation
20
the patient should be tested with near correction - if worn
to have little or no shadow

6. Schirmer's test II is used to measure...
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack
red-green
normal tearing

7. 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
A-constant
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

8. Laser interferometry uses which type of laser light?
rods
the cobalt blue filter
narrow angles may precipitate an angle-closure glaucoma attack
infrared

9. When performing a brightness acuity glare test - it is best to do which of the following?
central corneal thickness
for screening purposes - such as job applications
with the central cornea
Allow the patient to adjust to the light level before reading the letters.

10. The difference between Schirmer's test I and II is...
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris
refractive error
10 seconds

11. The average central thickness of the human cornea is...
545 pm
Allow the patient to adjust to the light level before reading the letters.
suspected acquired color defect
normal tearing

12. Illumination for the color plates test...
IOL power
varies according to the type of test administered
shortened axial length due to compression
more males than females

13. Hereditary color defects most often fall into which category?
a malingerer may invent a number - thus identifying him- or herself
23 to 24 mm
IOL power
red-green

14. The Ishihara color plates are useful...
for screening purposes - such as job applications
differentiate between congenital or acquired color blindness
normal tearing
3.0 D

15. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
more males than females
the defect tends to remain stable over time
expensive equipment
focus can he moved off-axis to obtain a clear reading

16. Acquired color vision defects...
can often be cured if the causative factor is eliminated
2.0 or more
2 to 3 seconds
normal tearing

17. How long should the patient be given to recognize the figure in a color plate?
narrow angles may precipitate an angle-closure glaucoma attack
central corneal thickness
can often be cured if the causative factor is eliminated
2 to 3 seconds

18. Which of the following should be color-vision tested one eye at a time?
can often be cured if the causative factor is eliminated
suspected acquired color defect
focus can he moved off-axis to obtain a clear reading
decrease in vision due to glare conditions

19. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
can often be cured if the causative factor is eliminated
narrow beam
remove the instrument from use

20. Glare testing is used to identify...
patient wearing spectacles
decrease in vision due to glare conditions
focus can he moved off-axis to obtain a clear reading
holding the probe perpendicular to the corneal surface

21. If a biometry instrument fails to calibrate properly - one should...
white to white corneal diameter
narrow beam
shortened axial length due to compression
remove the instrument from use

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

23. When should a child have his or her color vision checked?
before starting school
refractive surgery
expensive equipment
pressing on the globe too hard with the probe

24. A color plate that shows no obvious number to normal and abnormal alike is useful because...
expensive equipment
3.0 D
a malingerer may invent a number - thus identifying him- or herself
reflex tears

25. Hereditary color vision defects usually affect...
for screening purposes - such as job applications
posterior subcapsular cataract
holding the probe perpendicular to the corneal surface
both eyes equally

26. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
reading disabilities
expensive equipment
0.3 mm

27. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
is acceptable
decrease in vision due to glare conditions
2 to 3 seconds

28. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
'test eye'
are based on the same general equation
varies according to the type of test

29. A TBUT of which of the following would indicate tear film dysfunction?
are based on the same general equation
to the left of the scleral and orbital echoes
the appearance of dry spots
10 seconds

30. Measuring time for the Schirmer's test is...
ultrasound
patients who have had corneal refractive surgery
5 minutes
the use of an anesthetic

31. 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?
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth
to the left of the scleral and orbital echoes

32. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patients who have had corneal refractive surgery
patient wearing spectacles
corneal endothelial drop-out
to have little or no shadow

33. Schirmer's test does not require _____ except Test strips
a staining agent
normal tearing
red - green - and blue
expensive equipment

34. 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?
desired postoperative refraction
0.3 mm
reading disabilities
the defect tends to remain stable over time

35. Measuring corneal thickness via nonoptical pachymetry involves the use of...
shine the light flatly from the side - in the plane of the iris
ultrasound
IOL power
central corneal thickness

36. Just prior to the beginning of the TBUT test - the patient is instructed to...
is acceptable
blink
the appearance of dry spots
A Schirmer's test of 10 mm or more is considered normal.

37. An A-Sean can he artificially shortened due to...
3.0 D
pressing on the globe too hard with the probe
A-constant
is acceptable

38. When positioning the IOLMaster for the axial length reading...
shine the light flatly from the side - in the plane of the iris
focus can he moved off-axis to obtain a clear reading
one-fourth
545 pm

39. The axial length of the eye is important in the calculation of...
refractive error
desired postoperative refraction
'test eye'
IOL power

40. When using a penlight to estimate anterior chamber depth - an open angle would appear...
white to white corneal diameter
varies according to the type of test
central corneal thickness
to have little or no shadow

41. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
IOL power
is acceptable
rods

42. When using color plates - a score indicates abnormal color vision...
the appearance of dry spots
varies according to the type of test
narrow angles may precipitate an angle-closure glaucoma attack
red - green - and blue

43. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
shortened axial length due to compression
2.0 or more
rods

44. Which eye structure is responsible for color vision?
the appearance of dry spots
Allow the patient to adjust to the light level before reading the letters.
rods
A Schirmer's test of 10 mm or more is considered normal.

45. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
posterior subcapsular cataract
patients who have had corneal refractive surgery
shortened axial length due to compression
the cobalt blue filter

46. Schirmer's test I is used to measure...
reflex tears
more males than females
the defect tends to remain stable over time
remove the instrument from use

47. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
can often be cured if the causative factor is eliminated
a malingerer may invent a number - thus identifying him- or herself
shine the light flatly from the side - in the plane of the iris

48. This is not evaluated using rose Bengal except...
a staining agent
refractive error
having them trace the number/figure
corneal endothelial drop-out

49. When performing pachymetry prior to refractive surgery - it is generally best to begin...
IOL power
refractive error
narrow beam
with the central cornea

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