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 evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
refractive surgery
reading disabilities
patient wearing spectacles

2. Almost all of the formulas for calculating IOL power...
is acceptable
having them trace the number/figure
are based on the same general equation
23 to 24 mm

3. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
red-green
one-fourth
expensive equipment

4. A patient with which of the following potential diagnoses would be tested with bengal?
the cobalt blue filter
rods
more males than females
severe dry eye

5. Glare testing is used to identify...
A-constant
decrease in vision due to glare conditions
rods
0.3 mm

6. Schirmer's test II is used to measure...
having them trace the number/figure
shortened axial length due to compression
normal tearing
patient wearing spectacles

7. The Schirmer's test might be indicated in all of the following except...
white to white corneal diameter
severe dry eye
dacryocystitis
ultrasound

8. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
the defect tends to remain stable over time
normal tearing
shine the light flatly from the side - in the plane of the iris
is acceptable

9. If a biometry instrument fails to calibrate properly - one should...
narrow angles may precipitate an angle-closure glaucoma attack
remove the instrument from use
reading disabilities
both eyes equally

10. Measuring corneal thickness via nonoptical pachymetry involves the use of...
Allow the patient to adjust to the light level before reading the letters.
a staining agent
differentiate between congenital or acquired color blindness
ultrasound

11. The difference between Schirmer's test I and II is...
red-green
remove the instrument from use
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris

12. When using a penlight to estimate anterior chamber depth - an open angle would appear...
decrease in vision due to glare conditions
to have little or no shadow
posterior subcapsular cataract
red - green - and blue

13. In test a patient with the color pseudoisochromatic plates...
for screening purposes - such as job applications
the patient should be tested with near correction - if worn
to the left of the scleral and orbital echoes
3.0 D

14. When calculating intraocular lens (IOL) powers - one must enter...
A Schirmer's test of 10 mm or more is considered normal.
posterior subcapsular cataract
is acceptable
desired postoperative refraction

15. Acquired color vision defects...
10 seconds
can often be cured if the causative factor is eliminated
central corneal thickness
white to white corneal diameter

16. 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
more males than females
normal tearing
remove the instrument from use

17. Hereditary color vision defects affect...
A-constant
the appearance of dry spots
more males than females
5 minutes

18. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
IOL power
a staining agent
suspected acquired color defect

19. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
a staining agent
patient wearing spectacles
more males than females

20. Hereditary color vision defects usually affect...
both eyes equally
suspected acquired color defect
to have little or no shadow
a malingerer may invent a number - thus identifying him- or herself

21. Hereditary color defects most often fall into which category?
red-green
infrared
rods
'test eye'

22. 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?
2.0 or more
3.0 D
dacryocystitis
0.3 mm

23. Pachymetry readings are routinely taken prior to...
expensive equipment
can often be cured if the causative factor is eliminated
refractive surgery
ultrasound

24. When calculating IOL power - each of the following are necessary except...
narrow angles may precipitate an angle-closure glaucoma attack
varies according to the type of test
suspected acquired color defect
white to white corneal diameter

25. Schirmer's test I is used to measure...
blink
rods
reflex tears
the appearance of dry spots

26. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
A-constant
shine the light flatly from the side - in the plane of the iris
suspected acquired color defect

27. 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.
decrease in vision due to glare conditions
narrow angles may precipitate an angle-closure glaucoma attack
tear filter papers

28. When performing pachymetry prior to refractive surgery - it is generally best to begin...
Allow the patient to adjust to the light level before reading the letters.
varies according to the type of test administered
normal tearing
with the central cornea

29. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
focus can he moved off-axis to obtain a clear reading
to the left of the scleral and orbital echoes
20
desired postoperative refraction

30. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
ultrasound
pressing on the globe too hard with the probe
patients who have had corneal refractive surgery
narrow beam

31. The ideal IOLMaster axial length graph is...
focus can he moved off-axis to obtain a clear reading
a tall - central spike with only one peak and smaller spikes on either site
normal tearing
with the central cornea

32. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
2.0 or more
narrow beam
posterior subcapsular cataract
a tall - central spike with only one peak and smaller spikes on either site

33. The IOLMaster evaluates each of the following except...
a staining agent
to have little or no shadow
3.0 D
refractive error

34. The average central thickness of the human cornea is...
545 pm
A Schirmer's test of 10 mm or more is considered normal.
for screening purposes - such as job applications
the defect tends to remain stable over time

35. Schirmer's test does not require _____ except Test strips
expensive equipment
blink
0.3 mm
suspected acquired color defect

36. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
narrow angles may precipitate an angle-closure glaucoma attack
2.0 or more
the appearance of dry spots

37. 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

38. Which eye structure is responsible for color vision?
rods
one-fourth
can often be cured if the causative factor is eliminated
the patient is shown a sample that is discernable to normal and abnormal alike

39. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
corneal endothelial drop-out
the appearance of dry spots
0.3 mm
patient wearing spectacles

40. Before proceeding with the actual color plate test...
IOL power
normal tearing
tear filter papers
the patient is shown a sample that is discernable to normal and abnormal alike

41. The IOLMaster eliminates which of the following sources of error?
expensive equipment
shortened axial length due to compression
to the left of the scleral and orbital echoes
a staining agent

42. When performing the TBUT test - the observer is looking for...
the patient should be tested with near correction - if worn
2.0 or more
dacryocystitis
the appearance of dry spots

43. The axial length of the eye is important in the calculation of...
red-green
severe dry eye
IOL power
focus can he moved off-axis to obtain a clear reading

44. Measuring time for the Schirmer's test is...
blink
the appearance of dry spots
5 minutes
differentiate between congenital or acquired color blindness

45. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
to have little or no shadow
the cobalt blue filter
corneal endothelial drop-out

46. A rose bengal does not require the use of...
the cobalt blue filter
blink
the defect tends to remain stable over time
a tall - central spike with only one peak and smaller spikes on either site

47. This is not evaluated using rose Bengal except...
before starting school
545 pm
corneal endothelial drop-out
the patient should be tested with near correction - if worn

48. Which of the following should be color-vision tested one eye at a time?
a staining agent
suspected acquired color defect
before starting school
can often be cured if the causative factor is eliminated

49. 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...
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect
focus can he moved off-axis to obtain a clear reading
the cobalt blue filter

50. When positioning the IOLMaster for the axial length reading...
Allow the patient to adjust to the light level before reading the letters.
IOL power
differentiate between congenital or acquired color blindness
focus can he moved off-axis to obtain a clear reading