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. When should a child have his or her color vision checked?
5 minutes
the patient should be tested with near correction - if worn
before starting school
shortened axial length due to compression

2. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
'test eye'
a narrow angle and bowed iris cast a shadow on the iris
patient wearing spectacles

3. In which of the following would glare testing be most appropriate?
both eyes equally
red-green
posterior subcapsular cataract
Allow the patient to adjust to the light level before reading the letters.

4. The IOLMaster eliminates which of the following sources of error?
patients who have had corneal refractive surgery
to the left of the scleral and orbital echoes
shortened axial length due to compression
the appearance of dry spots

5. 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?
23 to 24 mm
severe dry eye
one-fourth
having them trace the number/figure

6. Which eye structure is responsible for color vision?
rods
5 minutes
a malingerer may invent a number - thus identifying him- or herself
2.0 or more

7. Color vision defects in children are frequently detected among those with...
reading disabilities
to the left of the scleral and orbital echoes
narrow beam
A-constant

8. Laser interferometry uses which type of laser light?
refractive surgery
the use of an anesthetic
can often be cured if the causative factor is eliminated
infrared

9. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
desired postoperative refraction
with the central cornea
corneal endothelial drop-out
narrow beam

10. Rose bengal is...
2 to 3 seconds
a staining agent
more males than females
to have little or no shadow

11. The axial length of the eye is important in the calculation of...
normal tearing
tear filter papers
central corneal thickness
IOL power

12. Hereditary color vision defects usually affect...
more males than females
both eyes equally
patient wearing spectacles
5 minutes

13. 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
more males than females
545 pm
2.0 or more

14. Just prior to the beginning of the TBUT test - the patient is instructed to...
holding the probe perpendicular to the corneal surface
2.0 or more
blink
a staining agent

15. Almost all of the formulas for calculating IOL power...
narrow beam
23 to 24 mm
refractive error
are based on the same general equation

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

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17. One of the keys in accurate pachymetry is...
20
the appearance of dry spots
holding the probe perpendicular to the corneal surface
patients who have had corneal refractive surgery

18. 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
infrared
0.3 mm
2.0 or more

19. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
blink
the defect tends to remain stable over time
shortened axial length due to compression
20

20. 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
the use of an anesthetic
central corneal thickness
'test eye'

21. How long should the patient be given to recognize the figure in a color plate?
23 to 24 mm
red - green - and blue
pressing on the globe too hard with the probe
2 to 3 seconds

22. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
varies according to the type of test
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect

23. Estimating the anterior chamber depth with a penlight works because...
the patient is shown a sample that is discernable to normal and abnormal alike
a narrow angle and bowed iris cast a shadow on the iris
expensive equipment
to have little or no shadow

24. Young children can be tested using the color plates by...
varies according to the type of test
focus can he moved off-axis to obtain a clear reading
having them trace the number/figure
Allow the patient to adjust to the light level before reading the letters.

25. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
rods
refractive error
varies according to the type of test administered
patient wearing spectacles

26. The Ishihara color plates are useful...
for screening purposes - such as job applications
reading disabilities
reflex tears
patient wearing spectacles

27. _______ are not used in evaluating tear break-up time (TBUT)
one-fourth
holding the probe perpendicular to the corneal surface
tear filter papers
corneal endothelial drop-out

28. In test a patient with the color pseudoisochromatic plates...
10 seconds
normal tearing
the patient should be tested with near correction - if worn
with the central cornea

29. The average central thickness of the human cornea is...
'test eye'
narrow beam
refractive error
545 pm

30. When calculating IOL power - each of the following are necessary except...
pressing on the globe too hard with the probe
white to white corneal diameter
severe dry eye
narrow beam

31. In evaluating an axial length scan - the retinal echo must be...
tear filter papers
to the left of the scleral and orbital echoes
for screening purposes - such as job applications
pressing on the globe too hard with the probe

32. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
remove the instrument from use
corneal endothelial drop-out
before starting school

33. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
'test eye'
patients who have had corneal refractive surgery
white to white corneal diameter
dacryocystitis

34. Hereditary color vision defects affect...
a malingerer may invent a number - thus identifying him- or herself
more males than females
a narrow angle and bowed iris cast a shadow on the iris
reading disabilities

35. Acquired color vision defects...
to the left of the scleral and orbital echoes
decrease in vision due to glare conditions
can often be cured if the causative factor is eliminated
corneal endothelial drop-out

36. Schirmer's test does not require _____ except Test strips
refractive error
varies according to the type of test administered
expensive equipment
23 to 24 mm

37. Schirmer's test I is used to measure...
shortened axial length due to compression
shine the light flatly from the side - in the plane of the iris
reflex tears
blink

38. When calculating intraocular lens (IOL) powers - one must enter...
remove the instrument from use
desired postoperative refraction
decrease in vision due to glare conditions
tear filter papers

39. Color vision testing is used to detect all of the following except...
3.0 D
focus can he moved off-axis to obtain a clear reading
differentiate between congenital or acquired color blindness
are based on the same general equation

40. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
patients who have had corneal refractive surgery
differentiate between congenital or acquired color blindness
having them trace the number/figure

41. A patient with which of the following potential diagnoses would be tested with bengal?
narrow angles may precipitate an angle-closure glaucoma attack
A Schirmer's test of 10 mm or more is considered normal.
Allow the patient to adjust to the light level before reading the letters.
severe dry eye

42. 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...
red - green - and blue
refractive error
2 to 3 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect

43. The axial length of an average adult eye is...
varies according to the type of test
with the central cornea
'test eye'
23 to 24 mm

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

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45. Pachymetry readings are routinely taken prior to...
refractive surgery
varies according to the type of test
545 pm
shine the light flatly from the side - in the plane of the iris

46. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
refractive error
are based on the same general equation
varies according to the type of test

47. With the 1OLMaster - the ideal signal-to-noise ratio is...
white to white corneal diameter
are based on the same general equation
2.0 or more
a staining agent

48. The IOLMaster evaluates each of the following except...
the cobalt blue filter
infrared
severe dry eye
refractive error

49. Schirmer's test II is used to measure...
normal tearing
central corneal thickness
545 pm
narrow angles may precipitate an angle-closure glaucoma attack

50. A rose bengal does not require the use of...
patients who have had corneal refractive surgery
2.0 or more
the cobalt blue filter
varies according to the type of test