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 axial length of the eye is important in the calculation of...
is acceptable
normal tearing
IOL power
reflex tears

2. 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
narrow beam
differentiate between congenital or acquired color blindness
white to white corneal diameter

3. When performing the TBUT test - the observer is looking for...
corneal endothelial drop-out
holding the probe perpendicular to the corneal surface
the appearance of dry spots
narrow angles may precipitate an angle-closure glaucoma attack

4. When positioning the IOLMaster for the axial length reading...
the patient should be tested with near correction - if worn
the use of an anesthetic
the defect tends to remain stable over time
focus can he moved off-axis to obtain a clear reading

5. If a biometry instrument fails to calibrate properly - one should...
patients who have had corneal refractive surgery
remove the instrument from use
2 to 3 seconds
A Schirmer's test of 10 mm or more is considered normal.

6. Hereditary color vision defects usually affect...
both eyes equally
corneal endothelial drop-out
narrow beam
A Schirmer's test of 10 mm or more is considered normal.

7. How long should the patient be given to recognize the figure in a color plate?
before starting school
Allow the patient to adjust to the light level before reading the letters.
refractive surgery
2 to 3 seconds

8. Rose bengal is...
tear filter papers
a staining agent
holding the probe perpendicular to the corneal surface
dacryocystitis

9. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
reflex tears
suspected acquired color defect
to have little or no shadow

10. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
545 pm
2.0 or more
the patient is shown a sample that is discernable to normal and abnormal alike

11. Which eye structure is responsible for color vision?
red - green - and blue
rods
tear filter papers
decrease in vision due to glare conditions

12. A color plate that shows no obvious number to normal and abnormal alike is useful because...
rods
infrared
a malingerer may invent a number - thus identifying him- or herself
corneal endothelial drop-out

13. The Schirmer's test might be indicated in all of the following except...
the use of an anesthetic
corneal endothelial drop-out
dacryocystitis
that the sound beam is directed to the optic disc and the measurement is incorrect

14. Color vision defects in children are frequently detected among those with...
with the central cornea
reading disabilities
holding the probe perpendicular to the corneal surface
blink

15. With the 1OLMaster - the ideal signal-to-noise ratio is...
the appearance of dry spots
2.0 or more
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.

16. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the cobalt blue filter
the defect tends to remain stable over time
both eyes equally
dacryocystitis

17. 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
more males than females
the patient is shown a sample that is discernable to normal and abnormal alike
are based on the same general equation

18. The photosensitive pigments of the eye are sensitive to...
reflex tears
10 seconds
red - green - and blue
suspected acquired color defect

19. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
20
a malingerer may invent a number - thus identifying him- or herself
reflex tears

20. The average central thickness of the human cornea is...
10 seconds
central corneal thickness
545 pm
the cobalt blue filter

21. Schirmer's test does not require _____ except Test strips
refractive surgery
expensive equipment
can often be cured if the causative factor is eliminated
is acceptable

22. When calculating intraocular lens (IOL) powers - one must enter...
tear filter papers
suspected acquired color defect
desired postoperative refraction
patient wearing spectacles

23. Hereditary color defects most often fall into which category?
are based on the same general equation
pressing on the globe too hard with the probe
red-green
the patient should be tested with near correction - if worn

24. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
to have little or no shadow
is acceptable
normal tearing
2 to 3 seconds

25. Schirmer's test I is used to measure...
desired postoperative refraction
reflex tears
more males than females
are based on the same general equation

26. In which of the following would glare testing be most appropriate?
the patient should be tested with near correction - if worn
posterior subcapsular cataract
narrow beam
refractive error

27. Acquired color vision defects...
23 to 24 mm
the defect tends to remain stable over time
red - green - and blue
can often be cured if the causative factor is eliminated

28. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
0.3 mm
pressing on the globe too hard with the probe
narrow beam
the appearance of dry spots

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

30. 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)...
a tall - central spike with only one peak and smaller spikes on either site
refractive error
A-constant
shine the light flatly from the side - in the plane of the iris

31. The IOLMaster evaluates each of the following except...
refractive error
the defect tends to remain stable over time
red - green - and blue
the cobalt blue filter

32. Measuring corneal thickness via nonoptical pachymetry involves the use of...
rods
ultrasound
2.0 or more
A Schirmer's test of 10 mm or more is considered normal.

33. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
the cobalt blue filter
ultrasound
varies according to the type of test

34. When performing a brightness acuity glare test - it is best to do which of the following?
a staining agent
is acceptable
Allow the patient to adjust to the light level before reading the letters.
for screening purposes - such as job applications

35. The Ishihara color plates are useful...
with the central cornea
holding the probe perpendicular to the corneal surface
a staining agent
for screening purposes - such as job applications

36. An A-Sean can he artificially shortened due to...
the appearance of dry spots
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
infrared

37. When using a penlight to estimate anterior chamber depth - an open angle would appear...
refractive surgery
to have little or no shadow
central corneal thickness
patients who have had corneal refractive surgery

38. Which of the following should be color-vision tested one eye at a time?
A-constant
suspected acquired color defect
2 to 3 seconds
differentiate between congenital or acquired color blindness

39. Before proceeding with the actual color plate test...
red-green
a malingerer may invent a number - thus identifying him- or herself
the patient is shown a sample that is discernable to normal and abnormal alike
corneal endothelial drop-out

40. It is important to estimate the anterior chamber depth prior to dilation because...
A Schirmer's test of 10 mm or more is considered normal.
infrared
more males than females
narrow angles may precipitate an angle-closure glaucoma attack

41. The difference between Schirmer's test I and II is...
23 to 24 mm
2.0 or more
a narrow angle and bowed iris cast a shadow on the iris
the use of an anesthetic

42. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
having them trace the number/figure
reading disabilities
patient wearing spectacles
23 to 24 mm

43. Hereditary color vision defects affect...
more males than females
the defect tends to remain stable over time
0.3 mm
for screening purposes - such as job applications

44. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
for screening purposes - such as job applications
0.3 mm
'test eye'

45. When using color plates - a score indicates abnormal color vision...
one-fourth
varies according to the type of test
the cobalt blue filter
tear filter papers

46. Almost all of the formulas for calculating IOL power...
severe dry eye
are based on the same general equation
both eyes equally
A Schirmer's test of 10 mm or more is considered normal.

47. Laser interferometry uses which type of laser light?
desired postoperative refraction
infrared
a tall - central spike with only one peak and smaller spikes on either site
5 minutes

48. Glare testing is used to identify...
expensive equipment
the defect tends to remain stable over time
a narrow angle and bowed iris cast a shadow on the iris
decrease in vision due to glare conditions

49. Just prior to the beginning of the TBUT test - the patient is instructed to...
red-green
blink
one-fourth
suspected acquired color defect

50. Pachymetry readings are routinely taken prior to...
the appearance of dry spots
more males than females
refractive surgery
pressing on the globe too hard with the probe