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. Laser interferometry uses which type of laser light?
545 pm
severe dry eye
infrared
A-constant

2. Rose bengal is...
a staining agent
the use of an anesthetic
blink
narrow beam

3. Color vision defects in children are frequently detected among those with...
reading disabilities
normal tearing
both eyes equally
are based on the same general equation

4. Estimating the anterior chamber depth with a penlight works because...
white to white corneal diameter
having them trace the number/figure
severe dry eye
a narrow angle and bowed iris cast a shadow on the iris

5. The IOLMaster evaluates each of the following except...
decrease in vision due to glare conditions
ultrasound
refractive error
having them trace the number/figure

6. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
red - green - and blue
narrow angles may precipitate an angle-closure glaucoma attack
a narrow angle and bowed iris cast a shadow on the iris

7. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
the appearance of dry spots
differentiate between congenital or acquired color blindness
with the central cornea

8. Hereditary color defects most often fall into which category?
red-green
2.0 or more
2 to 3 seconds
the patient should be tested with near correction - if worn

9. When calculating intraocular lens (IOL) powers - one must enter...
545 pm
holding the probe perpendicular to the corneal surface
IOL power
desired postoperative refraction

10. Hereditary color vision defects affect...
patient wearing spectacles
'test eye'
tear filter papers
more males than females

11. In which of the following would glare testing be most appropriate?
shortened axial length due to compression
posterior subcapsular cataract
are based on the same general equation
holding the probe perpendicular to the corneal surface

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

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13. When performing a brightness acuity glare test - it is best to do which of the following?
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.
both eyes equally
is acceptable

14. _______ are not used in evaluating tear break-up time (TBUT)
shortened axial length due to compression
focus can he moved off-axis to obtain a clear reading
having them trace the number/figure
tear filter papers

15. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
focus can he moved off-axis to obtain a clear reading
A Schirmer's test of 10 mm or more is considered normal.
3.0 D
patient wearing spectacles

16. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
patient wearing spectacles
A-constant
shine the light flatly from the side - in the plane of the iris
rods

17. Measuring time for the Schirmer's test is...
5 minutes
10 seconds
reading disabilities
corneal endothelial drop-out

18. The photosensitive pigments of the eye are sensitive to...
more males than females
with the central cornea
varies according to the type of test
red - green - and blue

19. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
more males than females
A Schirmer's test of 10 mm or more is considered normal.
5 minutes

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...
for screening purposes - such as job applications
the use of an anesthetic
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe

21. Schirmer's test does not require _____ except Test strips
A-constant
expensive equipment
white to white corneal diameter
a malingerer may invent a number - thus identifying him- or herself

22. Schirmer's test II is used to measure...
2.0 or more
one-fourth
normal tearing
rods

23. In test a patient with the color pseudoisochromatic plates...
normal tearing
shine the light flatly from the side - in the plane of the iris
the patient should be tested with near correction - if worn
expensive equipment

24. This is not evaluated using rose Bengal except...
focus can he moved off-axis to obtain a clear reading
white to white corneal diameter
3.0 D
corneal endothelial drop-out

25. The average central thickness of the human cornea is...
narrow beam
545 pm
23 to 24 mm
the cobalt blue filter

26. A rose bengal does not require the use of...
shine the light flatly from the side - in the plane of the iris
ultrasound
the cobalt blue filter
rods

27. Schirmer's test I is used to measure...
reflex tears
a tall - central spike with only one peak and smaller spikes on either site
the patient is shown a sample that is discernable to normal and abnormal alike
posterior subcapsular cataract

28. Hereditary color vision defects usually affect...
both eyes equally
the defect tends to remain stable over time
red - green - and blue
differentiate between congenital or acquired color blindness

29. Pachymetry readings are routinely taken prior to...
holding the probe perpendicular to the corneal surface
can often be cured if the causative factor is eliminated
refractive surgery
having them trace the number/figure

30. Almost all of the formulas for calculating IOL power...
rods
for screening purposes - such as job applications
are based on the same general equation
normal tearing

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
10 seconds
refractive error
holding the probe perpendicular to the corneal surface

32. The Schirmer's test might be indicated in all of the following except...
'test eye'
20
are based on the same general equation
dacryocystitis

33. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
patients who have had corneal refractive surgery
Allow the patient to adjust to the light level before reading the letters.
one-fourth
the defect tends to remain stable over time

34. The axial length of the eye is important in the calculation of...
red - green - and blue
differentiate between congenital or acquired color blindness
red-green
IOL power

35. The axial length of an average adult eye is...
23 to 24 mm
both eyes equally
ultrasound
dacryocystitis

36. When performing the TBUT test - the observer is looking for...
corneal endothelial drop-out
shine the light flatly from the side - in the plane of the iris
the appearance of dry spots
to have little or no shadow

37. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
a malingerer may invent a number - thus identifying him- or herself
a staining agent
IOL power
narrow beam

38. When calculating IOL power - each of the following are necessary except...
one-fourth
'test eye'
dacryocystitis
white to white corneal diameter

39. When using a penlight to estimate anterior chamber depth - an open angle would appear...
is acceptable
to have little or no shadow
refractive error
before starting school

40. When should a child have his or her color vision checked?
before starting school
narrow angles may precipitate an angle-closure glaucoma attack
remove the instrument from use
a staining agent

41. A color plate that shows no obvious number to normal and abnormal alike is useful because...
the defect tends to remain stable over time
a malingerer may invent a number - thus identifying him- or herself
expensive equipment
the cobalt blue filter

42. 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?
that the sound beam is directed to the optic disc and the measurement is incorrect
shine the light flatly from the side - in the plane of the iris
0.3 mm
10 seconds

43. Which eye structure is responsible for color vision?
desired postoperative refraction
0.3 mm
rods
'test eye'

44. It is important to estimate the anterior chamber depth prior to dilation because...
varies according to the type of test
central corneal thickness
narrow angles may precipitate an angle-closure glaucoma attack
severe dry eye

45. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
3.0 D
narrow beam
normal tearing

46. Acquired color vision defects...
545 pm
the patient should be tested with near correction - if worn
can often be cured if the causative factor is eliminated
decrease in vision due to glare conditions

47. Illumination for the color plates test...
is acceptable
patients who have had corneal refractive surgery
varies according to the type of test administered
reading disabilities

48. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
with the central cornea
20
narrow beam
a narrow angle and bowed iris cast a shadow on the iris

49. Young children can be tested using the color plates by...
20
IOL power
having them trace the number/figure
pressing on the globe too hard with the probe

50. The Ishihara color plates are useful...
for screening purposes - such as job applications
reflex tears
IOL power
reading disabilities