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. An A-Sean can he artificially shortened due to...
dacryocystitis
3.0 D
pressing on the globe too hard with the probe
decrease in vision due to glare conditions

2. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
to the left of the scleral and orbital echoes
patients who have had corneal refractive surgery
posterior subcapsular cataract

3. 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?
suspected acquired color defect
severe dry eye
one-fourth
0.3 mm

4. Color vision defects in children are frequently detected among those with...
a malingerer may invent a number - thus identifying him- or herself
reading disabilities
the patient is shown a sample that is discernable to normal and abnormal alike
23 to 24 mm

5. 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)...
the patient should be tested with near correction - if worn
20
A-constant
narrow beam

6. A color plate that shows no obvious number to normal and abnormal alike is useful because...
red-green
ultrasound
a malingerer may invent a number - thus identifying him- or herself
narrow angles may precipitate an angle-closure glaucoma attack

7. The average central thickness of the human cornea is...
for screening purposes - such as job applications
545 pm
2 to 3 seconds
rods

8. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
severe dry eye
refractive error
one-fourth

9. Rose bengal is...
differentiate between congenital or acquired color blindness
a staining agent
having them trace the number/figure
white to white corneal diameter

10. _______ are not used in evaluating tear break-up time (TBUT)
holding the probe perpendicular to the corneal surface
3.0 D
tear filter papers
expensive equipment

11. The axial length of the eye is important in the calculation of...
red-green
IOL power
before starting school
one-fourth

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

13. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
3.0 D
suspected acquired color defect
focus can he moved off-axis to obtain a clear reading

14. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
reading disabilities
narrow angles may precipitate an angle-closure glaucoma attack
20
the use of an anesthetic

15. Hereditary color defects most often fall into which category?
2.0 or more
red-green
that the sound beam is directed to the optic disc and the measurement is incorrect
both eyes equally

16. Just prior to the beginning of the TBUT test - the patient is instructed to...
narrow beam
differentiate between congenital or acquired color blindness
blink
more males than females

17. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
red - green - and blue
posterior subcapsular cataract
ultrasound

18. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
for screening purposes - such as job applications
shine the light flatly from the side - in the plane of the iris
reading disabilities

19. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
545 pm
dacryocystitis
reading disabilities

20. Hereditary color vision defects affect...
A Schirmer's test of 10 mm or more is considered normal.
desired postoperative refraction
more males than females
red-green

21. Which eye structure is responsible for color vision?
both eyes equally
rods
red - green - and blue
posterior subcapsular cataract

22. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
refractive error
IOL power
infrared

23. When performing pachymetry prior to refractive surgery - it is generally best to begin...
more males than females
with the central cornea
the patient should be tested with near correction - if worn
A Schirmer's test of 10 mm or more is considered normal.

24. In which of the following would glare testing be most appropriate?
more males than females
suspected acquired color defect
posterior subcapsular cataract
IOL power

25. The IOLMaster eliminates which of the following sources of error?
10 seconds
corneal endothelial drop-out
shortened axial length due to compression
the defect tends to remain stable over time

26. The Ishihara color plates are useful...
blink
for screening purposes - such as job applications
varies according to the type of test administered
A-constant

27. Laser interferometry uses which type of laser light?
varies according to the type of test administered
3.0 D
infrared
10 seconds

28. Which of the following should be color-vision tested one eye at a time?
ultrasound
the cobalt blue filter
A-constant
suspected acquired color defect

29. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
are based on the same general equation
reading disabilities
both eyes equally

30. When should a child have his or her color vision checked?
the patient should be tested with near correction - if worn
ultrasound
before starting school
are based on the same general equation

31. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
normal tearing
varies according to the type of test administered
shine the light flatly from the side - in the plane of the iris
the cobalt blue filter

32. When calculating intraocular lens (IOL) powers - one must enter...
'test eye'
differentiate between congenital or acquired color blindness
desired postoperative refraction
shine the light flatly from the side - in the plane of the iris

33. With the 1OLMaster - the ideal signal-to-noise ratio is...
reflex tears
with the central cornea
a tall - central spike with only one peak and smaller spikes on either site
2.0 or more

34. The type of pachymetry used to evaluate a glaucoma suspect is...
a staining agent
IOL power
central corneal thickness
2 to 3 seconds

35. Schirmer's test I is used to measure...
narrow angles may precipitate an angle-closure glaucoma attack
reflex tears
a narrow angle and bowed iris cast a shadow on the iris
one-fourth

36. Estimating the anterior chamber depth with a penlight works because...
one-fourth
a narrow angle and bowed iris cast a shadow on the iris
a tall - central spike with only one peak and smaller spikes on either site
rods

37. The Schirmer's test might be indicated in all of the following except...
2 to 3 seconds
central corneal thickness
dacryocystitis
20

38. Measuring time for the Schirmer's test is...
5 minutes
severe dry eye
holding the probe perpendicular to the corneal surface
corneal endothelial drop-out

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

40. When performing a brightness acuity glare test - it is best to do which of the following?
20
Allow the patient to adjust to the light level before reading the letters.
shortened axial length due to compression
differentiate between congenital or acquired color blindness

41. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
A-constant
before starting school
23 to 24 mm

42. When performing the TBUT test - the observer is looking for...
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots
10 seconds

43. Illumination for the color plates test...
0.3 mm
varies according to the type of test administered
A-constant
the defect tends to remain stable over time

44. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the defect tends to remain stable over time
Allow the patient to adjust to the light level before reading the letters.
a malingerer may invent a number - thus identifying him- or herself
refractive error

45. The axial length of an average adult eye is...
the cobalt blue filter
23 to 24 mm
545 pm
differentiate between congenital or acquired color blindness

46. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
suspected acquired color defect
rods
2.0 or more
patients who have had corneal refractive surgery

47. When positioning the IOLMaster for the axial length reading...
tear filter papers
before starting school
shine the light flatly from the side - in the plane of the iris
focus can he moved off-axis to obtain a clear reading

48. A patient with which of the following potential diagnoses would be tested with bengal?
a staining agent
patient wearing spectacles
2.0 or more
severe dry eye

49. A rose bengal does not require the use of...
the patient is shown a sample that is discernable to normal and abnormal alike
the cobalt blue filter
corneal endothelial drop-out
a malingerer may invent a number - thus identifying him- or herself

50. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
20
patient wearing spectacles
2.0 or more
a tall - central spike with only one peak and smaller spikes on either site