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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. When using color plates - a score indicates abnormal color vision...
desired postoperative refraction
3.0 D
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test

2. When should a child have his or her color vision checked?
tear filter papers
5 minutes
before starting school
one-fourth

3. An A-Sean can he artificially shortened due to...
severe dry eye
pressing on the globe too hard with the probe
red-green
dacryocystitis

4. The Schirmer's test might be indicated in all of the following except...
the defect tends to remain stable over time
Allow the patient to adjust to the light level before reading the letters.
dacryocystitis
infrared

5. The ideal IOLMaster axial length graph is...
severe dry eye
blink
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

6. In evaluating an axial length scan - the retinal echo must be...
refractive error
to the left of the scleral and orbital echoes
red - green - and blue
before starting school

7. Rose bengal is...
a staining agent
rods
shine the light flatly from the side - in the plane of the iris
holding the probe perpendicular to the corneal surface

8. The difference between Schirmer's test I and II is...
normal tearing
for screening purposes - such as job applications
the use of an anesthetic
decrease in vision due to glare conditions

9. The IOLMaster evaluates each of the following except...
shine the light flatly from the side - in the plane of the iris
refractive error
focus can he moved off-axis to obtain a clear reading
having them trace the number/figure

10. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
holding the probe perpendicular to the corneal surface
severe dry eye
varies according to the type of test

11. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
red - green - and blue
dacryocystitis
the patient is shown a sample that is discernable to normal and abnormal alike

12. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
varies according to the type of test administered
narrow beam
differentiate between congenital or acquired color blindness

13. A rose bengal does not require the use of...
refractive error
the cobalt blue filter
10 seconds
central corneal thickness

14. When positioning the IOLMaster for the axial length reading...
refractive error
focus can he moved off-axis to obtain a clear reading
normal tearing
white to white corneal diameter

15. Color vision testing is used to detect all of the following except...
a staining agent
5 minutes
varies according to the type of test
differentiate between congenital or acquired color blindness

16. Laser interferometry uses which type of laser light?
2 to 3 seconds
infrared
both eyes equally
reflex tears

17. Just prior to the beginning of the TBUT test - the patient is instructed to...
to the left of the scleral and orbital echoes
pressing on the globe too hard with the probe
blink
central corneal thickness

18. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
severe dry eye
the defect tends to remain stable over time
2 to 3 seconds
corneal endothelial drop-out

19. Hereditary color vision defects affect...
IOL power
are based on the same general equation
patients who have had corneal refractive surgery
more males than females

20. Before proceeding with the actual color plate test...
corneal endothelial drop-out
545 pm
the cobalt blue filter
the patient is shown a sample that is discernable to normal and abnormal alike

21. When performing the TBUT test - the observer is looking for...
focus can he moved off-axis to obtain a clear reading
Allow the patient to adjust to the light level before reading the letters.
the appearance of dry spots
that the sound beam is directed to the optic disc and the measurement is incorrect

22. With the 1OLMaster - the ideal signal-to-noise ratio is...
20
to the left of the scleral and orbital echoes
2.0 or more
10 seconds

23. 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)...
dacryocystitis
A-constant
patients who have had corneal refractive surgery
holding the probe perpendicular to the corneal surface

24. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
normal tearing
before starting school
focus can he moved off-axis to obtain a clear reading

25. When performing a brightness acuity glare test - it is best to do which of the following?
are based on the same general equation
patient wearing spectacles
Allow the patient to adjust to the light level before reading the letters.
normal tearing

26. In which of the following would glare testing be most appropriate?
A-constant
a narrow angle and bowed iris cast a shadow on the iris
reflex tears
posterior subcapsular cataract

27. Schirmer's test I is used to measure...
rods
a narrow angle and bowed iris cast a shadow on the iris
for screening purposes - such as job applications
reflex tears

28. Schirmer's test II is used to measure...
545 pm
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
normal tearing

29. The axial length of the eye is important in the calculation of...
patients who have had corneal refractive surgery
corneal endothelial drop-out
5 minutes
IOL power

30. When calculating IOL power - each of the following are necessary except...
shine the light flatly from the side - in the plane of the iris
with the central cornea
white to white corneal diameter
to the left of the scleral and orbital echoes

31. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
having them trace the number/figure
pressing on the globe too hard with the probe
narrow angles may precipitate an angle-closure glaucoma attack
patient wearing spectacles

32. 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...
is acceptable
red-green
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe

33. Color vision defects in children are frequently detected among those with...
to the left of the scleral and orbital echoes
white to white corneal diameter
23 to 24 mm
reading disabilities

34. If a biometry instrument fails to calibrate properly - one should...
posterior subcapsular cataract
both eyes equally
ultrasound
remove the instrument from use

35. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
with the central cornea
shine the light flatly from the side - in the plane of the iris
central corneal thickness
A-constant

36. Which of the following should be color-vision tested one eye at a time?
the appearance of dry spots
red - green - and blue
IOL power
suspected acquired color defect

37. Hereditary color defects most often fall into which category?
Allow the patient to adjust to the light level before reading the letters.
5 minutes
pressing on the globe too hard with the probe
red-green

38. Pachymetry readings are routinely taken prior to...
differentiate between congenital or acquired color blindness
white to white corneal diameter
refractive surgery
the use of an anesthetic

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

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40. Schirmer's test does not require _____ except Test strips
expensive equipment
patients who have had corneal refractive surgery
to have little or no shadow
dacryocystitis

41. Which eye structure is responsible for color vision?
is acceptable
rods
varies according to the type of test
varies according to the type of test administered

42. Illumination for the color plates test...
3.0 D
red-green
2.0 or more
varies according to the type of test administered

43. A TBUT of which of the following would indicate tear film dysfunction?
for screening purposes - such as job applications
severe dry eye
shine the light flatly from the side - in the plane of the iris
10 seconds

44. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a tall - central spike with only one peak and smaller spikes on either site
reflex tears
a malingerer may invent a number - thus identifying him- or herself
23 to 24 mm

45. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
reading disabilities
Allow the patient to adjust to the light level before reading the letters.
the patient should be tested with near correction - if worn

46. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
refractive surgery
infrared
shine the light flatly from the side - in the plane of the iris
is acceptable

47. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
3.0 D
central corneal thickness
A-constant
IOL power

48. When performing pachymetry prior to refractive surgery - it is generally best to begin...
IOL power
remove the instrument from use
with the central cornea
blink

49. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
the cobalt blue filter
narrow beam
patient wearing spectacles
for screening purposes - such as job applications

50. Measuring time for the Schirmer's test is...
5 minutes
central corneal thickness
ultrasound
shine the light flatly from the side - in the plane of the iris