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. It is important to estimate the anterior chamber depth prior to dilation because...
to have little or no shadow
reading disabilities
narrow angles may precipitate an angle-closure glaucoma attack
dacryocystitis

2. Glare testing is used to identify...
one-fourth
decrease in vision due to glare conditions
pressing on the globe too hard with the probe
dacryocystitis

3. Hereditary color vision defects affect...
can often be cured if the causative factor is eliminated
more males than females
ultrasound
central corneal thickness

4. Just prior to the beginning of the TBUT test - the patient is instructed to...
infrared
2.0 or more
blink
3.0 D

5. The ideal IOLMaster axial length graph is...
both eyes equally
ultrasound
posterior subcapsular cataract
a tall - central spike with only one peak and smaller spikes on either site

6. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
'test eye'
one-fourth
both eyes equally
3.0 D

7. Schirmer's test does not require _____ except Test strips
infrared
ultrasound
expensive equipment
a tall - central spike with only one peak and smaller spikes on either site

8. Almost all of the formulas for calculating IOL power...
the patient is shown a sample that is discernable to normal and abnormal alike
IOL power
are based on the same general equation
Allow the patient to adjust to the light level before reading the letters.

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?
one-fourth
narrow angles may precipitate an angle-closure glaucoma attack
0.3 mm
IOL power

10. When calculating intraocular lens (IOL) powers - one must enter...
narrow angles may precipitate an angle-closure glaucoma attack
ultrasound
a tall - central spike with only one peak and smaller spikes on either site
desired postoperative refraction

11. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
differentiate between congenital or acquired color blindness
corneal endothelial drop-out
to have little or no shadow

12. The Schirmer's test might be indicated in all of the following except...
narrow beam
corneal endothelial drop-out
varies according to the type of test
dacryocystitis

13. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
narrow beam
can often be cured if the causative factor is eliminated
the defect tends to remain stable over time
the patient is shown a sample that is discernable to normal and abnormal alike

14. Schirmer's test I is used to measure...
to the left of the scleral and orbital echoes
central corneal thickness
reflex tears
more males than females

15. In test a patient with the color pseudoisochromatic plates...
rods
the patient should be tested with near correction - if worn
10 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect

16. Which of the following should be color-vision tested one eye at a time?
the use of an anesthetic
reading disabilities
remove the instrument from use
suspected acquired color defect

17. Color vision testing is used to detect all of the following except...
corneal endothelial drop-out
differentiate between congenital or acquired color blindness
shine the light flatly from the side - in the plane of the iris
varies according to the type of test administered

18. A color plate that shows no obvious number to normal and abnormal alike is useful because...
for screening purposes - such as job applications
a malingerer may invent a number - thus identifying him- or herself
normal tearing
a staining agent

19. How long should the patient be given to recognize the figure in a color plate?
focus can he moved off-axis to obtain a clear reading
for screening purposes - such as job applications
2 to 3 seconds
Allow the patient to adjust to the light level before reading the letters.

20. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
rods
varies according to the type of test
20
A-constant

21. One of the keys in accurate pachymetry is...
dacryocystitis
remove the instrument from use
holding the probe perpendicular to the corneal surface
white to white corneal diameter

22. Pachymetry readings are routinely taken prior to...
one-fourth
the patient is shown a sample that is discernable to normal and abnormal alike
refractive surgery
Allow the patient to adjust to the light level before reading the letters.

23. This is not evaluated using rose Bengal except...
central corneal thickness
the cobalt blue filter
10 seconds
corneal endothelial drop-out

24. The IOLMaster eliminates which of the following sources of error?
blink
shortened axial length due to compression
'test eye'
reading disabilities

25. Laser interferometry uses which type of laser light?
infrared
expensive equipment
central corneal thickness
A-constant

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

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27. A rose bengal does not require the use of...
3.0 D
the cobalt blue filter
having them trace the number/figure
expensive equipment

28. _______ are not used in evaluating tear break-up time (TBUT)
central corneal thickness
red - green - and blue
tear filter papers
posterior subcapsular cataract

29. The type of pachymetry used to evaluate a glaucoma suspect is...
varies according to the type of test
23 to 24 mm
patients who have had corneal refractive surgery
central corneal thickness

30. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
shortened axial length due to compression
patient wearing spectacles
more males than females

31. Illumination for the color plates test...
10 seconds
varies according to the type of test administered
3.0 D
the patient should be tested with near correction - if worn

32. Schirmer's test II is used to measure...
the appearance of dry spots
central corneal thickness
pressing on the globe too hard with the probe
normal tearing

33. The average central thickness of the human cornea is...
blink
to the left of the scleral and orbital echoes
before starting school
545 pm

34. 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?
3.0 D
one-fourth
5 minutes
to the left of the scleral and orbital echoes

35. When using color plates - a score indicates abnormal color vision...
red-green
varies according to the type of test
can often be cured if the causative factor is eliminated
remove the instrument from use

36. The difference between Schirmer's test I and II is...
2 to 3 seconds
refractive error
the use of an anesthetic
ultrasound

37. Which eye structure is responsible for color vision?
the cobalt blue filter
Allow the patient to adjust to the light level before reading the letters.
A Schirmer's test of 10 mm or more is considered normal.
rods

38. An A-Sean can he artificially shortened due to...
0.3 mm
pressing on the globe too hard with the probe
rods
IOL power

39. The photosensitive pigments of the eye are sensitive to...
3.0 D
red - green - and blue
for screening purposes - such as job applications
central corneal thickness

40. The Ishihara color plates are useful...
shine the light flatly from the side - in the plane of the iris
for screening purposes - such as job applications
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test administered

41. The axial length of an average adult eye is...
holding the probe perpendicular to the corneal surface
varies according to the type of test administered
shine the light flatly from the side - in the plane of the iris
23 to 24 mm

42. Rose bengal is...
posterior subcapsular cataract
a staining agent
2.0 or more
white to white corneal diameter

43. When using a penlight to estimate anterior chamber depth - an open angle would appear...
2.0 or more
red-green
5 minutes
to have little or no shadow

44. When should a child have his or her color vision checked?
expensive equipment
more males than females
focus can he moved off-axis to obtain a clear reading
before starting school

45. Young children can be tested using the color plates by...
2.0 or more
A Schirmer's test of 10 mm or more is considered normal.
desired postoperative refraction
having them trace the number/figure

46. Color vision defects in children are frequently detected among those with...
23 to 24 mm
Allow the patient to adjust to the light level before reading the letters.
reading disabilities
dacryocystitis

47. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
are based on the same general equation
patients who have had corneal refractive surgery
2 to 3 seconds
2.0 or more

48. Hereditary color defects most often fall into which category?
reflex tears
remove the instrument from use
red-green
the defect tends to remain stable over time

49. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
red - green - and blue
differentiate between congenital or acquired color blindness
IOL power

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

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