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...
shortened axial length due to compression
tear filter papers
545 pm
IOL power

2. When performing a brightness acuity glare test - it is best to do which of the following?
tear filter papers
rods
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.

3. Rose bengal is...
infrared
a staining agent
one-fourth
red-green

4. In evaluating an axial length scan - the retinal echo must be...
to have little or no shadow
varies according to the type of test administered
20
to the left of the scleral and orbital echoes

5. Before proceeding with the actual color plate test...
holding the probe perpendicular to the corneal surface
the patient is shown a sample that is discernable to normal and abnormal alike
2.0 or more
can often be cured if the causative factor is eliminated

6. In which of the following would glare testing be most appropriate?
23 to 24 mm
posterior subcapsular cataract
reflex tears
one-fourth

7. A rose bengal does not require the use of...
rods
decrease in vision due to glare conditions
the cobalt blue filter
are based on the same general equation

8. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
refractive surgery
the use of an anesthetic
3.0 D
desired postoperative refraction

9. Color vision defects in children are frequently detected among those with...
reading disabilities
refractive error
a tall - central spike with only one peak and smaller spikes on either site
ultrasound

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?
the appearance of dry spots
focus can he moved off-axis to obtain a clear reading
one-fourth
holding the probe perpendicular to the corneal surface

11. The Ishihara color plates are useful...
for screening purposes - such as job applications
white to white corneal diameter
23 to 24 mm
545 pm

12. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
545 pm
A Schirmer's test of 10 mm or more is considered normal.
20
red-green

13. Schirmer's test does not require _____ except Test strips
are based on the same general equation
both eyes equally
expensive equipment
holding the probe perpendicular to the corneal surface

14. The photosensitive pigments of the eye are sensitive to...
the use of an anesthetic
desired postoperative refraction
tear filter papers
red - green - and blue

15. How long should the patient be given to recognize the figure in a color plate?
IOL power
can often be cured if the causative factor is eliminated
2 to 3 seconds
a staining agent

16. 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-constant
more males than females
red - green - and blue
0.3 mm

17. Just prior to the beginning of the TBUT test - the patient is instructed to...
suspected acquired color defect
tear filter papers
blink
can often be cured if the causative factor is eliminated

18. When calculating IOL power - each of the following are necessary except...
0.3 mm
white to white corneal diameter
are based on the same general equation
dacryocystitis

19. The type of pachymetry used to evaluate a glaucoma suspect is...
to have little or no shadow
shortened axial length due to compression
central corneal thickness
the use of an anesthetic

20. 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...
ultrasound
tear filter papers
that the sound beam is directed to the optic disc and the measurement is incorrect
5 minutes

21. Young children can be tested using the color plates by...
one-fourth
are based on the same general equation
having them trace the number/figure
to the left of the scleral and orbital echoes

22. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
Allow the patient to adjust to the light level before reading the letters.
shine the light flatly from the side - in the plane of the iris
blink
IOL power

23. Hereditary color defects most often fall into which category?
the use of an anesthetic
having them trace the number/figure
posterior subcapsular cataract
red-green

24. The IOLMaster evaluates each of the following except...
refractive error
tear filter papers
the defect tends to remain stable over time
IOL power

25. The average central thickness of the human cornea is...
545 pm
dacryocystitis
patients who have had corneal refractive surgery
to have little or no shadow

26. Almost all of the formulas for calculating IOL power...
patient wearing spectacles
3.0 D
5 minutes
are based on the same general equation

27. When should a child have his or her color vision checked?
before starting school
'test eye'
3.0 D
23 to 24 mm

28. Color vision testing is used to detect all of the following except...
Allow the patient to adjust to the light level before reading the letters.
a staining agent
differentiate between congenital or acquired color blindness
more males than females

29. Measuring corneal thickness via nonoptical pachymetry involves the use of...
red - green - and blue
one-fourth
the patient should be tested with near correction - if worn
ultrasound

30. _______ are not used in evaluating tear break-up time (TBUT)
545 pm
ultrasound
patient wearing spectacles
tear filter papers

31. Measuring time for the Schirmer's test is...
5 minutes
3.0 D
blink
varies according to the type of test administered

32. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
holding the probe perpendicular to the corneal surface
the appearance of dry spots
dacryocystitis

33. Glare testing is used to identify...
decrease in vision due to glare conditions
shortened axial length due to compression
2.0 or more
to have little or no shadow

34. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
IOL power
the defect tends to remain stable over time
2 to 3 seconds
blink

35. Illumination for the color plates test...
A-constant
differentiate between congenital or acquired color blindness
varies according to the type of test administered
having them trace the number/figure

36. Pachymetry readings are routinely taken prior to...
IOL power
refractive surgery
infrared
desired postoperative refraction

37. A TBUT of which of the following would indicate tear film dysfunction?
having them trace the number/figure
'test eye'
10 seconds
20

38. If a biometry instrument fails to calibrate properly - one should...
0.3 mm
'test eye'
remove the instrument from use
the use of an anesthetic

39. One of the keys in accurate pachymetry is...
having them trace the number/figure
holding the probe perpendicular to the corneal surface
for screening purposes - such as job applications
2.0 or more

40. A normally functioning lacrimal gland will produce by much wetting on a Schirmer's test strip after 5 minutes?

41. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
A Schirmer's test of 10 mm or more is considered normal.
patient wearing spectacles
A-constant

42. Laser interferometry uses which type of laser light?
'test eye'
patient wearing spectacles
infrared
refractive surgery

43. Schirmer's test II is used to measure...
patients who have had corneal refractive surgery
0.3 mm
normal tearing
a staining agent

44. The IOLMaster eliminates which of the following sources of error?
severe dry eye
that the sound beam is directed to the optic disc and the measurement is incorrect
before starting school
shortened axial length due to compression

45. The axial length of an average adult eye is...
A Schirmer's test of 10 mm or more is considered normal.
23 to 24 mm
differentiate between congenital or acquired color blindness
the defect tends to remain stable over time

46. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
tear filter papers
reflex tears
blink

47. When using a penlight to estimate anterior chamber depth - an open angle would appear...
a malingerer may invent a number - thus identifying him- or herself
to have little or no shadow
differentiate between congenital or acquired color blindness
more males than females

48. Which of the following should be color-vision tested one eye at a time?
that the sound beam is directed to the optic disc and the measurement is incorrect
suspected acquired color defect
the appearance of dry spots
varies according to the type of test administered

49. The difference between Schirmer's test I and II is...
the use of an anesthetic
suspected acquired color defect
one-fourth
blink

50. Acquired color vision defects...
can often be cured if the causative factor is eliminated
to the left of the scleral and orbital echoes
reflex tears
desired postoperative refraction