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. A rose bengal does not require the use of...
the appearance of dry spots
decrease in vision due to glare conditions
red - green - and blue
the cobalt blue filter

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
more males than females
545 pm
A Schirmer's test of 10 mm or more is considered normal.
patients who have had corneal refractive surgery

3. When using color plates - a score indicates abnormal color vision...
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test
patients who have had corneal refractive surgery
tear filter papers

4. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
red - green - and blue
is acceptable
before starting school
narrow beam

5. When should a child have his or her color vision checked?
'test eye'
can often be cured if the causative factor is eliminated
one-fourth
before starting school

6. The average central thickness of the human cornea is...
545 pm
tear filter papers
are based on the same general equation
corneal endothelial drop-out

7. The IOLMaster eliminates which of the following sources of error?
rods
shortened axial length due to compression
with the central cornea
IOL power

8. In test a patient with the color pseudoisochromatic plates...
the use of an anesthetic
A-constant
patient wearing spectacles
the patient should be tested with near correction - if worn

9. In which of the following would glare testing be most appropriate?
refractive surgery
posterior subcapsular cataract
refractive error
a malingerer may invent a number - thus identifying him- or herself

10. 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
the defect tends to remain stable over time
red-green
545 pm

11. Estimating the anterior chamber depth with a penlight works because...
the use of an anesthetic
a narrow angle and bowed iris cast a shadow on the iris
more males than females
varies according to the type of test administered

12. In evaluating an axial length scan - the retinal echo must be...
red - green - and blue
to the left of the scleral and orbital echoes
Allow the patient to adjust to the light level before reading the letters.
5 minutes

13. Schirmer's test II is used to measure...
corneal endothelial drop-out
blink
infrared
normal tearing

14. The type of pachymetry used to evaluate a glaucoma suspect is...
expensive equipment
narrow beam
central corneal thickness
red-green

15. Schirmer's test does not require _____ except Test strips
tear filter papers
5 minutes
focus can he moved off-axis to obtain a clear reading
expensive equipment

16. When performing the TBUT test - the observer is looking for...
before starting school
red - green - and blue
IOL power
the appearance of dry spots

17. How long should the patient be given to recognize the figure in a color plate?
to have little or no shadow
is acceptable
2 to 3 seconds
severe dry eye

18. When calculating intraocular lens (IOL) powers - one must enter...
remove the instrument from use
the defect tends to remain stable over time
5 minutes
desired postoperative refraction

19. Which of the following should be color-vision tested one eye at a time?
0.3 mm
suspected acquired color defect
20
varies according to the type of test

20. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
patients who have had corneal refractive surgery
dacryocystitis
the defect tends to remain stable over time
shortened axial length due to compression

21. The axial length of an average adult eye is...
a malingerer may invent a number - thus identifying him- or herself
23 to 24 mm
infrared
tear filter papers

22. Hereditary color vision defects usually affect...
3.0 D
5 minutes
the appearance of dry spots
both eyes equally

23. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
23 to 24 mm
is acceptable
Allow the patient to adjust to the light level before reading the letters.

24. Hereditary color defects most often fall into which category?
red-green
patients who have had corneal refractive surgery
red - green - and blue
A Schirmer's test of 10 mm or more is considered normal.

25. Just prior to the beginning of the TBUT test - the patient is instructed to...
545 pm
patient wearing spectacles
holding the probe perpendicular to the corneal surface
blink

26. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
the defect tends to remain stable over time
a narrow angle and bowed iris cast a shadow on the iris
a tall - central spike with only one peak and smaller spikes on either site

27. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
to the left of the scleral and orbital echoes
posterior subcapsular cataract
dacryocystitis
patient wearing spectacles

28. Acquired color vision defects...
a staining agent
shortened axial length due to compression
with the central cornea
can often be cured if the causative factor is eliminated

29. 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...
a malingerer may invent a number - thus identifying him- or herself
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green
10 seconds

30. With the 1OLMaster - the ideal signal-to-noise ratio is...
0.3 mm
2.0 or more
decrease in vision due to glare conditions
reading disabilities

31. The difference between Schirmer's test I and II is...
is acceptable
refractive surgery
a tall - central spike with only one peak and smaller spikes on either site
the use of an anesthetic

32. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
Allow the patient to adjust to the light level before reading the letters.
narrow beam
the cobalt blue filter
red - green - and blue

33. A patient with which of the following potential diagnoses would be tested with bengal?
narrow beam
severe dry eye
a staining agent
having them trace the number/figure

34. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack
for screening purposes - such as job applications
20

35. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
reflex tears
infrared
'test eye'

36. Color vision defects in children are frequently detected among those with...
expensive equipment
a tall - central spike with only one peak and smaller spikes on either site
the patient is shown a sample that is discernable to normal and abnormal alike
reading disabilities

37. This is not evaluated using rose Bengal except...
2 to 3 seconds
narrow beam
corneal endothelial drop-out
varies according to the type of test administered

38. The ideal IOLMaster axial length graph is...
is acceptable
5 minutes
a tall - central spike with only one peak and smaller spikes on either site
pressing on the globe too hard with the probe

39. 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)...
white to white corneal diameter
having them trace the number/figure
refractive error
A-constant

40. Almost all of the formulas for calculating IOL power...
refractive surgery
are based on the same general equation
more males than females
to the left of the scleral and orbital echoes

41. When calculating IOL power - each of the following are necessary except...
2.0 or more
reflex tears
a tall - central spike with only one peak and smaller spikes on either site
white to white corneal diameter

42. When positioning the IOLMaster for the axial length reading...
reading disabilities
545 pm
focus can he moved off-axis to obtain a clear reading
varies according to the type of test administered

43. 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.
tear filter papers
shine the light flatly from the side - in the plane of the iris
23 to 24 mm

44. Rose bengal is...
one-fourth
the defect tends to remain stable over time
IOL power
a staining agent

45. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
20
reading disabilities
3.0 D
differentiate between congenital or acquired color blindness

46. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
varies according to the type of test
focus can he moved off-axis to obtain a clear reading
red - green - and blue

47. Laser interferometry uses which type of laser light?
the defect tends to remain stable over time
patients who have had corneal refractive surgery
infrared
varies according to the type of test

48. Pachymetry readings are routinely taken prior to...
that the sound beam is directed to the optic disc and the measurement is incorrect
the patient should be tested with near correction - if worn
5 minutes
refractive surgery

49. When using a penlight to estimate anterior chamber depth - an open angle would appear...
both eyes equally
to have little or no shadow
focus can he moved off-axis to obtain a clear reading
2 to 3 seconds

50. Which eye structure is responsible for color vision?
remove the instrument from use
reflex tears
rods
holding the probe perpendicular to the corneal surface