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. _______ are not used in evaluating tear break-up time (TBUT)
expensive equipment
infrared
'test eye'
tear filter papers

2. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
the patient should be tested with near correction - if worn
can often be cured if the causative factor is eliminated
infrared

3. Which eye structure is responsible for color vision?
ultrasound
shortened axial length due to compression
rods
the patient is shown a sample that is discernable to normal and abnormal alike

4. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
IOL power
3.0 D
shortened axial length due to compression
before starting school

5. Measuring time for the Schirmer's test is...
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack
tear filter papers
5 minutes

6. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the patient is shown a sample that is discernable to normal and abnormal alike
Allow the patient to adjust to the light level before reading the letters.
patients who have had corneal refractive surgery
patient wearing spectacles

7. Almost all of the formulas for calculating IOL power...
are based on the same general equation
5 minutes
differentiate between congenital or acquired color blindness
pressing on the globe too hard with the probe

8. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
A-constant
narrow beam
expensive equipment
narrow angles may precipitate an angle-closure glaucoma attack

9. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
the defect tends to remain stable over time
a staining agent
the cobalt blue filter

10. Young children can be tested using the color plates by...
refractive surgery
expensive equipment
infrared
having them trace the number/figure

11. Glare testing is used to identify...
is acceptable
infrared
decrease in vision due to glare conditions
the use of an anesthetic

12. It is important to estimate the anterior chamber depth prior to dilation because...
are based on the same general equation
10 seconds
reading disabilities
narrow angles may precipitate an angle-closure glaucoma attack

13. The difference between Schirmer's test I and II is...
the use of an anesthetic
blink
a tall - central spike with only one peak and smaller spikes on either site
a staining agent

14. In which of the following would glare testing be most appropriate?
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
shine the light flatly from the side - in the plane of the iris
to have little or no shadow

15. The Schirmer's test might be indicated in all of the following except...
5 minutes
dacryocystitis
23 to 24 mm
a staining agent

16. Rose bengal is...
focus can he moved off-axis to obtain a clear reading
dacryocystitis
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

17. Illumination for the color plates test...
holding the probe perpendicular to the corneal surface
varies according to the type of test administered
can often be cured if the causative factor is eliminated
2.0 or more

18. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
can often be cured if the causative factor is eliminated
a malingerer may invent a number - thus identifying him- or herself
having them trace the number/figure

19. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
are based on the same general equation
A-constant
varies according to the type of test

20. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
before starting school
focus can he moved off-axis to obtain a clear reading
narrow angles may precipitate an angle-closure glaucoma attack

21. Schirmer's test I is used to measure...
patient wearing spectacles
that the sound beam is directed to the optic disc and the measurement is incorrect
reflex tears
Allow the patient to adjust to the light level before reading the letters.

22. Estimating the anterior chamber depth with a penlight works because...
red-green
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
focus can he moved off-axis to obtain a clear reading

23. Color vision defects in children are frequently detected among those with...
dacryocystitis
suspected acquired color defect
reading disabilities
Allow the patient to adjust to the light level before reading the letters.

24. Pachymetry readings are routinely taken prior to...
holding the probe perpendicular to the corneal surface
5 minutes
refractive surgery
545 pm

25. Hereditary color vision defects usually affect...
pressing on the globe too hard with the probe
the patient should be tested with near correction - if worn
both eyes equally
suspected acquired color defect

26. 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
'test eye'
A-constant
varies according to the type of test administered

27. Schirmer's test does not require _____ except Test strips
red-green
severe dry eye
tear filter papers
expensive equipment

28. The IOLMaster eliminates which of the following sources of error?
pressing on the globe too hard with the probe
to have little or no shadow
shortened axial length due to compression
reading disabilities

29. The axial length of an average adult eye is...
varies according to the type of test
white to white corneal diameter
both eyes equally
23 to 24 mm

30. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
3.0 D
normal tearing
infrared

31. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
decrease in vision due to glare conditions
the appearance of dry spots
suspected acquired color defect

32. Just prior to the beginning of the TBUT test - the patient is instructed to...
pressing on the globe too hard with the probe
blink
suspected acquired color defect
A-constant

33. Measuring corneal thickness via nonoptical pachymetry involves the use of...
patients who have had corneal refractive surgery
focus can he moved off-axis to obtain a clear reading
having them trace the number/figure
ultrasound

34. Laser interferometry uses which type of laser light?
10 seconds
pressing on the globe too hard with the probe
infrared
tear filter papers

35. 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.
545 pm
are based on the same general equation
2.0 or more

36. 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

37. If a biometry instrument fails to calibrate properly - one should...
shortened axial length due to compression
remove the instrument from use
a tall - central spike with only one peak and smaller spikes on either site
having them trace the number/figure

38. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
23 to 24 mm
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect

39. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
545 pm
normal tearing
white to white corneal diameter
is acceptable

40. When using color plates - a score indicates abnormal color vision...
the patient is shown a sample that is discernable to normal and abnormal alike
with the central cornea
2.0 or more
varies according to the type of test

41. With the 1OLMaster - the ideal signal-to-noise ratio is...
varies according to the type of test administered
2.0 or more
before starting school
decrease in vision due to glare conditions

42. When positioning the IOLMaster for the axial length reading...
desired postoperative refraction
red-green
central corneal thickness
focus can he moved off-axis to obtain a clear reading

43. How long should the patient be given to recognize the figure in a color plate?
ultrasound
545 pm
posterior subcapsular cataract
2 to 3 seconds

44. An A-Sean can he artificially shortened due to...
the appearance of dry spots
the cobalt blue filter
reading disabilities
pressing on the globe too hard with the probe

45. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
remove the instrument from use
varies according to the type of test administered
varies according to the type of test

46. In evaluating an axial length scan - the retinal echo must be...
red-green
to the left of the scleral and orbital echoes
2 to 3 seconds
one-fourth

47. The ideal IOLMaster axial length graph is...
A Schirmer's test of 10 mm or more is considered normal.
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
a malingerer may invent a number - thus identifying him- or herself

48. 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)...
expensive equipment
red-green
more males than females
A-constant

49. 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?
differentiate between congenital or acquired color blindness
infrared
20
one-fourth

50. A patient with which of the following potential diagnoses would be tested with bengal?
A-constant
patients who have had corneal refractive surgery
'test eye'
severe dry eye