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 Schirmer's test might be indicated in all of the following except...
patients who have had corneal refractive surgery
2.0 or more
expensive equipment
dacryocystitis

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
more males than females
patients who have had corneal refractive surgery
normal tearing
'test eye'

3. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
20
narrow beam
the use of an anesthetic
dacryocystitis

4. Schirmer's test I is used to measure...
23 to 24 mm
differentiate between congenital or acquired color blindness
reflex tears
focus can he moved off-axis to obtain a clear reading

5. If a biometry instrument fails to calibrate properly - one should...
reading disabilities
3.0 D
remove the instrument from use
a malingerer may invent a number - thus identifying him- or herself

6. Rose bengal is...
are based on the same general equation
a malingerer may invent a number - thus identifying him- or herself
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

7. The axial length of the eye is important in the calculation of...
central corneal thickness
the patient should be tested with near correction - if worn
0.3 mm
IOL power

8. When calculating IOL power - each of the following are necessary except...
corneal endothelial drop-out
white to white corneal diameter
shine the light flatly from the side - in the plane of the iris
23 to 24 mm

9. Which eye structure is responsible for color vision?
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn
patient wearing spectacles
rods

10. When performing the TBUT test - the observer is looking for...
both eyes equally
infrared
the appearance of dry spots
white to white corneal diameter

11. Almost all of the formulas for calculating IOL power...
central corneal thickness
are based on the same general equation
for screening purposes - such as job applications
a tall - central spike with only one peak and smaller spikes on either site

12. When performing pachymetry prior to refractive surgery - it is generally best to begin...
having them trace the number/figure
varies according to the type of test
both eyes equally
with the central cornea

13. Illumination for the color plates test...
narrow beam
varies according to the type of test administered
ultrasound
are based on the same general equation

14. Measuring time for the Schirmer's test is...
the defect tends to remain stable over time
refractive error
0.3 mm
5 minutes

15. The IOLMaster eliminates which of the following sources of error?
narrow beam
'test eye'
shortened axial length due to compression
reflex tears

16. _______ are not used in evaluating tear break-up time (TBUT)
both eyes equally
having them trace the number/figure
tear filter papers
holding the probe perpendicular to the corneal surface

17. Which of the following should be color-vision tested one eye at a time?
the use of an anesthetic
suspected acquired color defect
are based on the same general equation
2.0 or more

18. 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
blink
posterior subcapsular cataract

19. 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
dacryocystitis
remove the instrument from use
the use of an anesthetic

20. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
to have little or no shadow
3.0 D
infrared
IOL power

21. Estimating the anterior chamber depth with a penlight works because...
remove the instrument from use
IOL power
to have little or no shadow
a narrow angle and bowed iris cast a shadow on the iris

22. In evaluating an axial length scan - the retinal echo must be...
for screening purposes - such as job applications
patient wearing spectacles
to the left of the scleral and orbital echoes
shortened axial length due to compression

23. The ideal IOLMaster axial length graph is...
Allow the patient to adjust to the light level before reading the letters.
a tall - central spike with only one peak and smaller spikes on either site
tear filter papers
5 minutes

24. When positioning the IOLMaster for the axial length reading...
'test eye'
to have little or no shadow
the use of an anesthetic
focus can he moved off-axis to obtain a clear reading

25. Color vision defects in children are frequently detected among those with...
reading disabilities
545 pm
rods
tear filter papers

26. The Ishihara color plates are useful...
2 to 3 seconds
for screening purposes - such as job applications
shortened axial length due to compression
is acceptable

27. Young children can be tested using the color plates by...
20
having them trace the number/figure
decrease in vision due to glare conditions
reading disabilities

28. Pachymetry readings are routinely taken prior to...
before starting school
pressing on the globe too hard with the probe
2.0 or more
refractive surgery

29. Measuring corneal thickness via nonoptical pachymetry involves the use of...
2 to 3 seconds
differentiate between congenital or acquired color blindness
ultrasound
20

30. The axial length of an average adult eye is...
shine the light flatly from the side - in the plane of the iris
545 pm
23 to 24 mm
decrease in vision due to glare conditions

31. When should a child have his or her color vision checked?
severe dry eye
5 minutes
before starting school
corneal endothelial drop-out

32. In test a patient with the color pseudoisochromatic plates...
focus can he moved off-axis to obtain a clear reading
rods
desired postoperative refraction
the patient should be tested with near correction - if worn

33. 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
white to white corneal diameter
one-fourth
20

34. When calculating intraocular lens (IOL) powers - one must enter...
a malingerer may invent a number - thus identifying him- or herself
varies according to the type of test administered
A Schirmer's test of 10 mm or more is considered normal.
desired postoperative refraction

35. Schirmer's test does not require _____ except Test strips
are based on the same general equation
the cobalt blue filter
expensive equipment
the patient is shown a sample that is discernable to normal and abnormal alike

36. Glare testing is used to identify...
decrease in vision due to glare conditions
A-constant
10 seconds
0.3 mm

37. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
A Schirmer's test of 10 mm or more is considered normal.
differentiate between congenital or acquired color blindness
red-green

38. Hereditary color vision defects affect...
more males than females
refractive surgery
normal tearing
red - green - and blue

39. This is not evaluated using rose Bengal except...
545 pm
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris
both eyes equally

40. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
5 minutes
a narrow angle and bowed iris cast a shadow on the iris
are based on the same general equation

41. When performing a brightness acuity glare test - it is best to do which of the following?
severe dry eye
holding the probe perpendicular to the corneal surface
desired postoperative refraction
Allow the patient to adjust to the light level before reading the letters.

42. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
reflex tears
holding the probe perpendicular to the corneal surface
pressing on the globe too hard with the probe

43. In which of the following would glare testing be most appropriate?
refractive surgery
the use of an anesthetic
to have little or no shadow
posterior subcapsular cataract

44. 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?
'test eye'
one-fourth
red-green
is acceptable

45. A rose bengal does not require the use of...
can often be cured if the causative factor is eliminated
varies according to the type of test
a narrow angle and bowed iris cast a shadow on the iris
the cobalt blue filter

46. Hereditary color defects most often fall into which category?
before starting school
red-green
posterior subcapsular cataract
reading disabilities

47. The type of pachymetry used to evaluate a glaucoma suspect is...
Allow the patient to adjust to the light level before reading the letters.
central corneal thickness
0.3 mm
can often be cured if the causative factor is eliminated

48. It is important to estimate the anterior chamber depth prior to dilation because...
red - green - and blue
narrow angles may precipitate an angle-closure glaucoma attack
shine the light flatly from the side - in the plane of the iris
that the sound beam is directed to the optic disc and the measurement is incorrect

49. 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)...
2 to 3 seconds
'test eye'
ultrasound
A-constant

50. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
for screening purposes - such as job applications
is acceptable
shortened axial length due to compression
3.0 D