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. This is not evaluated using rose Bengal except...
that the sound beam is directed to the optic disc and the measurement is incorrect
0.3 mm
ultrasound
corneal endothelial drop-out

2. When should a child have his or her color vision checked?
5 minutes
before starting school
both eyes equally
the use of an anesthetic

3. A color plate that shows no obvious number to normal and abnormal alike is useful because...
2.0 or more
a malingerer may invent a number - thus identifying him- or herself
both eyes equally
a narrow angle and bowed iris cast a shadow on the iris

4. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
one-fourth
focus can he moved off-axis to obtain a clear reading
20
more males than females

5. The axial length of an average adult eye is...
with the central cornea
expensive equipment
23 to 24 mm
to the left of the scleral and orbital echoes

6. 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?
is acceptable
to have little or no shadow
one-fourth
narrow angles may precipitate an angle-closure glaucoma attack

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

8. The difference between Schirmer's test I and II is...
holding the probe perpendicular to the corneal surface
patient wearing spectacles
the use of an anesthetic
can often be cured if the causative factor is eliminated

9. Schirmer's test I is used to measure...
2.0 or more
reflex tears
pressing on the globe too hard with the probe
reading disabilities

10. Which eye structure is responsible for color vision?
rods
a staining agent
both eyes equally
narrow beam

11. When performing a brightness acuity glare test - it is best to do which of the following?
a malingerer may invent a number - thus identifying him- or herself
having them trace the number/figure
Allow the patient to adjust to the light level before reading the letters.
suspected acquired color defect

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

13. 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
10 seconds
is acceptable
the defect tends to remain stable over time

14. When positioning the IOLMaster for the axial length reading...
rods
remove the instrument from use
focus can he moved off-axis to obtain a clear reading
the patient should be tested with near correction - if worn

15. In which of the following would glare testing be most appropriate?
the cobalt blue filter
central corneal thickness
posterior subcapsular cataract
can often be cured if the causative factor is eliminated

16. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
shine the light flatly from the side - in the plane of the iris
patient wearing spectacles
2 to 3 seconds

17. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
desired postoperative refraction
a tall - central spike with only one peak and smaller spikes on either site
red - green - and blue

18. It is important to estimate the anterior chamber depth prior to dilation because...
having them trace the number/figure
0.3 mm
3.0 D
narrow angles may precipitate an angle-closure glaucoma attack

19. Color vision defects in children are frequently detected among those with...
reading disabilities
to have little or no shadow
desired postoperative refraction
red - green - and blue

20. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
varies according to the type of test administered
both eyes equally
2.0 or more

21. The photosensitive pigments of the eye are sensitive to...
the appearance of dry spots
expensive equipment
the defect tends to remain stable over time
red - green - and blue

22. When calculating intraocular lens (IOL) powers - one must enter...
suspected acquired color defect
desired postoperative refraction
to the left of the scleral and orbital echoes
0.3 mm

23. Hereditary color vision defects affect...
5 minutes
3.0 D
differentiate between congenital or acquired color blindness
more males than females

24. 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
a narrow angle and bowed iris cast a shadow on the iris
20
expensive equipment

25. The IOLMaster evaluates each of the following except...
10 seconds
blink
refractive error
Allow the patient to adjust to the light level before reading the letters.

26. Measuring time for the Schirmer's test is...
differentiate between congenital or acquired color blindness
the patient is shown a sample that is discernable to normal and abnormal alike
5 minutes
are based on the same general equation

27. Estimating the anterior chamber depth with a penlight works because...
both eyes equally
shine the light flatly from the side - in the plane of the iris
desired postoperative refraction
a narrow angle and bowed iris cast a shadow on the iris

28. Schirmer's test II is used to measure...
a staining agent
normal tearing
suspected acquired color defect
shortened axial length due to compression

29. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
are based on the same general equation
shine the light flatly from the side - in the plane of the iris
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack

30. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
Allow the patient to adjust to the light level before reading the letters.
patient wearing spectacles
more males than females
545 pm

31. A TBUT of which of the following would indicate tear film dysfunction?
shortened axial length due to compression
10 seconds
infrared
corneal endothelial drop-out

32. The IOLMaster eliminates which of the following sources of error?
blink
red - green - and blue
narrow beam
shortened axial length due to compression

33. When using a penlight to estimate anterior chamber depth - an open angle would appear...
20
IOL power
narrow beam
to have little or no shadow

34. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
desired postoperative refraction
with the central cornea
the appearance of dry spots

35. Hereditary color defects most often fall into which category?
red-green
shortened axial length due to compression
tear filter papers
the defect tends to remain stable over time

36. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
red - green - and blue
a malingerer may invent a number - thus identifying him- or herself
differentiate between congenital or acquired color blindness

37. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
23 to 24 mm
is acceptable
0.3 mm

38. The type of pachymetry used to evaluate a glaucoma suspect is...
the cobalt blue filter
refractive error
a tall - central spike with only one peak and smaller spikes on either site
central corneal thickness

39. If a biometry instrument fails to calibrate properly - one should...
red-green
remove the instrument from use
severe dry eye
A-constant

40. Rose bengal is...
infrared
a staining agent
A Schirmer's test of 10 mm or more is considered normal.
10 seconds

41. Schirmer's test does not require _____ except Test strips
a malingerer may invent a number - thus identifying him- or herself
expensive equipment
ultrasound
A-constant

42. The axial length of the eye is important in the calculation of...
IOL power
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect
the defect tends to remain stable over time

43. The Ishihara color plates are useful...
for screening purposes - such as job applications
holding the probe perpendicular to the corneal surface
patient wearing spectacles
can often be cured if the causative factor is eliminated

44. 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?
red-green
0.3 mm
central corneal thickness
10 seconds

45. Young children can be tested using the color plates by...
having them trace the number/figure
2 to 3 seconds
for screening purposes - such as job applications
Allow the patient to adjust to the light level before reading the letters.

46. When using color plates - a score indicates abnormal color vision...
is acceptable
varies according to the type of test
white to white corneal diameter
a tall - central spike with only one peak and smaller spikes on either site

47. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
'test eye'
23 to 24 mm
refractive error

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)...
infrared
A-constant
545 pm
corneal endothelial drop-out

49. Pachymetry readings are routinely taken prior to...
3.0 D
the patient is shown a sample that is discernable to normal and abnormal alike
white to white corneal diameter
refractive surgery

50. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
more males than females
central corneal thickness
normal tearing
narrow beam