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Certified Ophthalmic Assistant

Subjects : certifications, health-sciences

Instructions:

Answer 50 questions in 15 minutes.
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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. When should a child have his or her color vision checked?
before starting school
one-fourth
holding the probe perpendicular to the corneal surface
for screening purposes - such as job applications

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

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3. Laser interferometry uses which type of laser light?
infrared
a narrow angle and bowed iris cast a shadow on the iris
is acceptable
the appearance of dry spots

4. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
both eyes equally
white to white corneal diameter
A-constant
the defect tends to remain stable over time

5. 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...
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth
pressing on the globe too hard with the probe
blink

6. Schirmer's test does not require _____ except Test strips
expensive equipment
red - green - and blue
ultrasound
to the left of the scleral and orbital echoes

7. When using a penlight to estimate anterior chamber depth - an open angle would appear...
is acceptable
20
patient wearing spectacles
to have little or no shadow

8. Schirmer's test I is used to measure...
IOL power
reflex tears
'test eye'
one-fourth

9. 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?
can often be cured if the causative factor is eliminated
0.3 mm
pressing on the globe too hard with the probe
more males than females

10. The IOLMaster evaluates each of the following except...
the patient is shown a sample that is discernable to normal and abnormal alike
23 to 24 mm
more males than females
refractive error

11. _______ are not used in evaluating tear break-up time (TBUT)
5 minutes
tear filter papers
patients who have had corneal refractive surgery
reading disabilities

12. Color vision testing is used to detect all of the following except...
A-constant
white to white corneal diameter
the appearance of dry spots
differentiate between congenital or acquired color blindness

13. The IOLMaster eliminates which of the following sources of error?
expensive equipment
the defect tends to remain stable over time
the use of an anesthetic
shortened axial length due to compression

14. When using color plates - a score indicates abnormal color vision...
refractive surgery
Allow the patient to adjust to the light level before reading the letters.
pressing on the globe too hard with the probe
varies according to the type of test

15. If a biometry instrument fails to calibrate properly - one should...
posterior subcapsular cataract
remove the instrument from use
blink
0.3 mm

16. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
a narrow angle and bowed iris cast a shadow on the iris
10 seconds
IOL power
is acceptable

17. In which of the following would glare testing be most appropriate?
is acceptable
posterior subcapsular cataract
the patient should be tested with near correction - if worn
can often be cured if the causative factor is eliminated

18. A color plate that shows no obvious number to normal and abnormal alike is useful because...
A Schirmer's test of 10 mm or more is considered normal.
the patient is shown a sample that is discernable to normal and abnormal alike
more males than females
a malingerer may invent a number - thus identifying him- or herself

19. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
narrow angles may precipitate an angle-closure glaucoma attack
shine the light flatly from the side - in the plane of the iris
a staining agent
to the left of the scleral and orbital echoes

20. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
suspected acquired color defect
shortened axial length due to compression
infrared

21. 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
for screening purposes - such as job applications
3.0 D
reflex tears

22. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
to have little or no shadow
A Schirmer's test of 10 mm or more is considered normal.
the use of an anesthetic

23. Rose bengal is...
IOL power
'test eye'
a staining agent
before starting school

24. The average central thickness of the human cornea is...
before starting school
545 pm
blink
a malingerer may invent a number - thus identifying him- or herself

25. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
desired postoperative refraction
the patient should be tested with near correction - if worn
A-constant

26. Acquired color vision defects...
can often be cured if the causative factor is eliminated
for screening purposes - such as job applications
refractive error
shine the light flatly from the side - in the plane of the iris

27. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
severe dry eye
patients who have had corneal refractive surgery
posterior subcapsular cataract
the patient should be tested with near correction - if worn

28. Schirmer's test II is used to measure...
reflex tears
with the central cornea
normal tearing
the appearance of dry spots

29. Glare testing is used to identify...
decrease in vision due to glare conditions
severe dry eye
expensive equipment
a malingerer may invent a number - thus identifying him- or herself

30. Which eye structure is responsible for color vision?
rods
to the left of the scleral and orbital echoes
the patient is shown a sample that is discernable to normal and abnormal alike
reflex tears

31. Hereditary color vision defects usually affect...
both eyes equally
rods
blink
can often be cured if the causative factor is eliminated

32. Hereditary color defects most often fall into which category?
red-green
can often be cured if the causative factor is eliminated
corneal endothelial drop-out
infrared

33. Almost all of the formulas for calculating IOL power...
are based on the same general equation
white to white corneal diameter
varies according to the type of test administered
a staining agent

34. The type of pachymetry used to evaluate a glaucoma suspect is...
a tall - central spike with only one peak and smaller spikes on either site
infrared
central corneal thickness
varies according to the type of test

35. When calculating intraocular lens (IOL) powers - one must enter...
white to white corneal diameter
narrow beam
desired postoperative refraction
the defect tends to remain stable over time

36. Just prior to the beginning of the TBUT test - the patient is instructed to...
can often be cured if the causative factor is eliminated
a narrow angle and bowed iris cast a shadow on the iris
blink
varies according to the type of test

37. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
0.3 mm
decrease in vision due to glare conditions
suspected acquired color defect
narrow beam

38. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
both eyes equally
ultrasound
suspected acquired color defect

39. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
can often be cured if the causative factor is eliminated
varies according to the type of test
pressing on the globe too hard with the probe

40. The axial length of the eye is important in the calculation of...
IOL power
5 minutes
severe dry eye
refractive error

41. A rose bengal does not require the use of...
reading disabilities
the cobalt blue filter
posterior subcapsular cataract
5 minutes

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

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43. An A-Sean can he artificially shortened due to...
normal tearing
red-green
varies according to the type of test
pressing on the globe too hard with the probe

44. Pachymetry readings are routinely taken prior to...
reflex tears
narrow beam
refractive surgery
shine the light flatly from the side - in the plane of the iris

45. When calculating IOL power - each of the following are necessary except...
545 pm
white to white corneal diameter
23 to 24 mm
ultrasound

46. The axial length of an average adult eye is...
a narrow angle and bowed iris cast a shadow on the iris
reflex tears
patients who have had corneal refractive surgery
23 to 24 mm

47. The photosensitive pigments of the eye are sensitive to...
can often be cured if the causative factor is eliminated
the cobalt blue filter
a narrow angle and bowed iris cast a shadow on the iris
red - green - and blue

48. The Ishihara color plates are useful...
a narrow angle and bowed iris cast a shadow on the iris
expensive equipment
for screening purposes - such as job applications
remove the instrument from use

49. With the 1OLMaster - the ideal signal-to-noise ratio is...
Allow the patient to adjust to the light level before reading the letters.
2.0 or more
the use of an anesthetic
differentiate between congenital or acquired color blindness

50. When performing pachymetry prior to refractive surgery - it is generally best to begin...
a tall - central spike with only one peak and smaller spikes on either site
normal tearing
IOL power
with the central cornea

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Certified Ophthalmic Assistant

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