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 using a penlight to estimate anterior chamber depth - an open angle would appear...
Allow the patient to adjust to the light level before reading the letters.
to have little or no shadow
corneal endothelial drop-out
a staining agent

2. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
A-constant
2 to 3 seconds
patients who have had corneal refractive surgery

3. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
refractive error
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris

4. The type of pachymetry used to evaluate a glaucoma suspect is...
the defect tends to remain stable over time
central corneal thickness
having them trace the number/figure
a narrow angle and bowed iris cast a shadow on the iris

5. Measuring corneal thickness via nonoptical pachymetry involves the use of...
10 seconds
varies according to the type of test administered
narrow beam
ultrasound

6. The Schirmer's test might be indicated in all of the following except...
decrease in vision due to glare conditions
for screening purposes - such as job applications
dacryocystitis
shortened axial length due to compression

7. When using color plates - a score indicates abnormal color vision...
the cobalt blue filter
shine the light flatly from the side - in the plane of the iris
varies according to the type of test
IOL power

8. When should a child have his or her color vision checked?
before starting school
desired postoperative refraction
is acceptable
IOL power

9. Color vision testing is used to detect all of the following except...
reading disabilities
shine the light flatly from the side - in the plane of the iris
refractive surgery
differentiate between congenital or acquired color blindness

10. When performing a brightness acuity glare test - it is best to do which of the following?
posterior subcapsular cataract
focus can he moved off-axis to obtain a clear reading
suspected acquired color defect
Allow the patient to adjust to the light level before reading the letters.

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

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12. A color plate that shows no obvious number to normal and abnormal alike is useful because...
patients who have had corneal refractive surgery
white to white corneal diameter
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself

13. The axial length of an average adult eye is...
23 to 24 mm
the appearance of dry spots
white to white corneal diameter
5 minutes

14. The axial length of the eye is important in the calculation of...
differentiate between congenital or acquired color blindness
refractive error
expensive equipment
IOL power

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

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16. The Ishihara color plates are useful...
for screening purposes - such as job applications
varies according to the type of test
corneal endothelial drop-out
can often be cured if the causative factor is eliminated

17. Glare testing is used to identify...
decrease in vision due to glare conditions
3.0 D
suspected acquired color defect
the cobalt blue filter

18. When performing the TBUT test - the observer is looking for...
pressing on the globe too hard with the probe
narrow angles may precipitate an angle-closure glaucoma attack
refractive error
the appearance of dry spots

19. Just prior to the beginning of the TBUT test - the patient is instructed to...
both eyes equally
narrow angles may precipitate an angle-closure glaucoma attack
blink
the defect tends to remain stable over time

20. Estimating the anterior chamber depth with a penlight works because...
a staining agent
2 to 3 seconds
the appearance of dry spots
a narrow angle and bowed iris cast a shadow on the iris

21. 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
corneal endothelial drop-out
with the central cornea
posterior subcapsular cataract

22. When calculating intraocular lens (IOL) powers - one must enter...
5 minutes
0.3 mm
desired postoperative refraction
reflex tears

23. Before proceeding with the actual color plate test...
Allow the patient to adjust to the light level before reading the letters.
23 to 24 mm
the patient is shown a sample that is discernable to normal and abnormal alike
blink

24. An A-Sean can he artificially shortened due to...
0.3 mm
the appearance of dry spots
pressing on the globe too hard with the probe
a narrow angle and bowed iris cast a shadow on the iris

25. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
both eyes equally
narrow beam
dacryocystitis
corneal endothelial drop-out

26. The IOLMaster evaluates each of the following except...
for screening purposes - such as job applications
the appearance of dry spots
refractive error
5 minutes

27. 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
tear filter papers
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack

28. The difference between Schirmer's test I and II is...
the use of an anesthetic
differentiate between congenital or acquired color blindness
2.0 or more
2 to 3 seconds

29. 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?
expensive equipment
blink
0.3 mm
ultrasound

30. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
decrease in vision due to glare conditions
a staining agent
rods

31. Rose bengal is...
desired postoperative refraction
0.3 mm
the cobalt blue filter
a staining agent

32. Pachymetry readings are routinely taken prior to...
the patient should be tested with near correction - if worn
one-fourth
refractive surgery
'test eye'

33. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
red-green
severe dry eye
patients who have had corneal refractive surgery
having them trace the number/figure

34. In evaluating an axial length scan - the retinal echo must be...
5 minutes
patient wearing spectacles
to the left of the scleral and orbital echoes
severe dry eye

35. Schirmer's test I is used to measure...
shortened axial length due to compression
varies according to the type of test
reflex tears
infrared

36. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
severe dry eye
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green

37. Illumination for the color plates test...
the cobalt blue filter
varies according to the type of test administered
patients who have had corneal refractive surgery
shortened axial length due to compression

38. 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
2.0 or more
narrow beam
desired postoperative refraction

39. 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?
varies according to the type of test
to the left of the scleral and orbital echoes
corneal endothelial drop-out
one-fourth

40. Laser interferometry uses which type of laser light?
focus can he moved off-axis to obtain a clear reading
expensive equipment
reading disabilities
infrared

41. With the 1OLMaster - the ideal signal-to-noise ratio is...
2 to 3 seconds
2.0 or more
varies according to the type of test administered
'test eye'

42. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
having them trace the number/figure
Allow the patient to adjust to the light level before reading the letters.
20

43. Hereditary color vision defects usually affect...
ultrasound
to have little or no shadow
for screening purposes - such as job applications
both eyes equally

44. A rose bengal does not require the use of...
is acceptable
reflex tears
severe dry eye
the cobalt blue filter

45. A patient with which of the following potential diagnoses would be tested with bengal?
3.0 D
severe dry eye
the defect tends to remain stable over time
2 to 3 seconds

46. Hereditary color defects most often fall into which category?
23 to 24 mm
red-green
to have little or no shadow
the cobalt blue filter

47. In test a patient with the color pseudoisochromatic plates...
shortened axial length due to compression
blink
before starting school
the patient should be tested with near correction - if worn

48. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
desired postoperative refraction
10 seconds
tear filter papers

49. Young children can be tested using the color plates by...
having them trace the number/figure
remove the instrument from use
central corneal thickness
the use of an anesthetic

50. Which eye structure is responsible for color vision?
before starting school
blink
having them trace the number/figure
rods