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 IOLMaster must be calibrated daily using a...

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2. Hereditary color defects most often fall into which category?
refractive surgery
focus can he moved off-axis to obtain a clear reading
red-green
a malingerer may invent a number - thus identifying him- or herself

3. If a biometry instrument fails to calibrate properly - one should...
blink
remove the instrument from use
rods
A Schirmer's test of 10 mm or more is considered normal.

4. When performing pachymetry prior to refractive surgery - it is generally best to begin...
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
with the central cornea
5 minutes

5. When positioning the IOLMaster for the axial length reading...
to the left of the scleral and orbital echoes
2.0 or more
infrared
focus can he moved off-axis to obtain a clear reading

6. Almost all of the formulas for calculating IOL power...
shortened axial length due to compression
normal tearing
differentiate between congenital or acquired color blindness
are based on the same general equation

7. A rose bengal does not require the use of...
the cobalt blue filter
central corneal thickness
narrow angles may precipitate an angle-closure glaucoma attack
having them trace the number/figure

8. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
refractive error
5 minutes
2 to 3 seconds

9. The axial length of an average adult eye is...
severe dry eye
for screening purposes - such as job applications
23 to 24 mm
to the left of the scleral and orbital echoes

10. Hereditary color vision defects usually affect...
both eyes equally
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.
expensive equipment

11. The IOLMaster evaluates each of the following except...
varies according to the type of test administered
reading disabilities
shine the light flatly from the side - in the plane of the iris
refractive error

12. When using a penlight to estimate anterior chamber depth - an open angle would appear...
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally
to have little or no shadow

13. Measuring time for the Schirmer's test is...
5 minutes
holding the probe perpendicular to the corneal surface
A-constant
narrow angles may precipitate an angle-closure glaucoma attack

14. Color vision testing is used to detect all of the following except...
the patient is shown a sample that is discernable to normal and abnormal alike
differentiate between congenital or acquired color blindness
the appearance of dry spots
dacryocystitis

15. _______ are not used in evaluating tear break-up time (TBUT)
desired postoperative refraction
tear filter papers
red-green
central corneal thickness

16. With the 1OLMaster - the ideal signal-to-noise ratio is...
5 minutes
2.0 or more
reading disabilities
the use of an anesthetic

17. In which of the following would glare testing be most appropriate?
corneal endothelial drop-out
posterior subcapsular cataract
5 minutes
shine the light flatly from the side - in the plane of the iris

18. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
20
rods
corneal endothelial drop-out

19. In evaluating an axial length scan - the retinal echo must be...
the patient is shown a sample that is discernable to normal and abnormal alike
remove the instrument from use
Allow the patient to adjust to the light level before reading the letters.
to the left of the scleral and orbital echoes

20. This is not evaluated using rose Bengal except...
20
varies according to the type of test
expensive equipment
corneal endothelial drop-out

21. 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?
are based on the same general equation
one-fourth
to have little or no shadow
to the left of the scleral and orbital echoes

22. When performing a brightness acuity glare test - it is best to do which of the following?
refractive surgery
shortened axial length due to compression
Allow the patient to adjust to the light level before reading the letters.
0.3 mm

23. Color vision defects in children are frequently detected among those with...
dacryocystitis
reading disabilities
suspected acquired color defect
central corneal thickness

24. 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...
expensive equipment
that the sound beam is directed to the optic disc and the measurement is incorrect
reflex tears
the appearance of dry spots

25. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patients who have had corneal refractive surgery
patient wearing spectacles
a narrow angle and bowed iris cast a shadow on the iris
with the central cornea

26. It is important to estimate the anterior chamber depth prior to dilation because...
'test eye'
a narrow angle and bowed iris cast a shadow on the iris
shortened axial length due to compression
narrow angles may precipitate an angle-closure glaucoma attack

27. An A-Sean can he artificially shortened due to...
the use of an anesthetic
pressing on the globe too hard with the probe
before starting school
narrow angles may precipitate an angle-closure glaucoma attack

28. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
varies according to the type of test
narrow beam
rods
A-constant

29. 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
dacryocystitis
IOL power
infrared

30. Rose bengal is...
545 pm
the use of an anesthetic
desired postoperative refraction
a staining agent

31. A color plate that shows no obvious number to normal and abnormal alike is useful because...
pressing on the globe too hard with the probe
varies according to the type of test administered
a tall - central spike with only one peak and smaller spikes on either site
a malingerer may invent a number - thus identifying him- or herself

32. When should a child have his or her color vision checked?
holding the probe perpendicular to the corneal surface
a narrow angle and bowed iris cast a shadow on the iris
before starting school
narrow angles may precipitate an angle-closure glaucoma attack

33. 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
a staining agent
central corneal thickness
a tall - central spike with only one peak and smaller spikes on either site

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

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35. When calculating IOL power - each of the following are necessary except...
10 seconds
can often be cured if the causative factor is eliminated
white to white corneal diameter
narrow angles may precipitate an angle-closure glaucoma attack

36. Laser interferometry uses which type of laser light?
the patient should be tested with near correction - if worn
infrared
refractive error
differentiate between congenital or acquired color blindness

37. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
tear filter papers
20
varies according to the type of test
IOL power

38. How long should the patient be given to recognize the figure in a color plate?
3.0 D
2 to 3 seconds
infrared
narrow angles may precipitate an angle-closure glaucoma attack

39. Schirmer's test II is used to measure...
a staining agent
infrared
normal tearing
are based on the same general equation

40. Schirmer's test I is used to measure...
that the sound beam is directed to the optic disc and the measurement is incorrect
reflex tears
red - green - and blue
severe dry eye

41. The photosensitive pigments of the eye are sensitive to...
tear filter papers
red - green - and blue
rods
central corneal thickness

42. Hereditary color vision defects affect...
varies according to the type of test administered
before starting school
2 to 3 seconds
more males than females

43. A patient with which of the following potential diagnoses would be tested with bengal?
the use of an anesthetic
severe dry eye
2.0 or more
infrared

44. Just prior to the beginning of the TBUT test - the patient is instructed to...
normal tearing
blink
3.0 D
shortened axial length due to compression

45. The average central thickness of the human cornea is...
can often be cured if the causative factor is eliminated
545 pm
refractive surgery
narrow beam

46. Acquired color vision defects...
'test eye'
central corneal thickness
5 minutes
can often be cured if the causative factor is eliminated

47. 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?
0.3 mm
pressing on the globe too hard with the probe
infrared
5 minutes

48. Which eye structure is responsible for color vision?
desired postoperative refraction
rods
white to white corneal diameter
red-green

49. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
corneal endothelial drop-out
'test eye'
3.0 D
before starting school

50. Young children can be tested using the color plates by...
the patient is shown a sample that is discernable to normal and abnormal alike
having them trace the number/figure
blink
expensive equipment