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 performing the TBUT test - the observer is looking for...
with the central cornea
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.
the appearance of dry spots

2. How long should the patient be given to recognize the figure in a color plate?
are based on the same general equation
a malingerer may invent a number - thus identifying him- or herself
2 to 3 seconds
a staining agent

3. Hereditary color vision defects usually affect...
shortened axial length due to compression
that the sound beam is directed to the optic disc and the measurement is incorrect
both eyes equally
having them trace the number/figure

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

5. When performing a brightness acuity glare test - it is best to do which of the following?
can often be cured if the causative factor is eliminated
differentiate between congenital or acquired color blindness
for screening purposes - such as job applications
Allow the patient to adjust to the light level before reading the letters.

6. When calculating IOL power - each of the following are necessary except...
2 to 3 seconds
white to white corneal diameter
2.0 or more
5 minutes

7. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
both eyes equally
patients who have had corneal refractive surgery
more males than females
narrow beam

8. Just prior to the beginning of the TBUT test - the patient is instructed to...
are based on the same general equation
desired postoperative refraction
blink
severe dry eye

9. _______ are not used in evaluating tear break-up time (TBUT)
corneal endothelial drop-out
both eyes equally
the use of an anesthetic
tear filter papers

10. Hereditary color defects most often fall into which category?
red-green
IOL power
varies according to the type of test administered
the use of an anesthetic

11. When should a child have his or her color vision checked?
before starting school
the appearance of dry spots
A Schirmer's test of 10 mm or more is considered normal.
white to white corneal diameter

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

13. Almost all of the formulas for calculating IOL power...
A Schirmer's test of 10 mm or more is considered normal.
suspected acquired color defect
are based on the same general equation
0.3 mm

14. 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?
reading disabilities
shortened axial length due to compression
one-fourth
normal tearing

15. The average central thickness of the human cornea is...
are based on the same general equation
23 to 24 mm
refractive surgery
545 pm

16. A color plate that shows no obvious number to normal and abnormal alike is useful because...
a malingerer may invent a number - thus identifying him- or herself
blink
A-constant
varies according to the type of test

17. Schirmer's test does not require _____ except Test strips
red-green
severe dry eye
expensive equipment
the patient should be tested with near correction - if worn

18. When using color plates - a score indicates abnormal color vision...
patients who have had corneal refractive surgery
varies according to the type of test administered
0.3 mm
varies according to the type of test

19. The type of pachymetry used to evaluate a glaucoma suspect is...
the defect tends to remain stable over time
holding the probe perpendicular to the corneal surface
before starting school
central corneal thickness

20. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
reflex tears
10 seconds
posterior subcapsular cataract

21. Laser interferometry uses which type of laser light?
suspected acquired color defect
infrared
desired postoperative refraction
rods

22. 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
focus can he moved off-axis to obtain a clear reading
can often be cured if the causative factor is eliminated

23. The IOLMaster evaluates each of the following except...
patients who have had corneal refractive surgery
the patient should be tested with near correction - if worn
the patient is shown a sample that is discernable to normal and abnormal alike
refractive error

24. When performing pachymetry prior to refractive surgery - it is generally best to begin...
infrared
corneal endothelial drop-out
are based on the same general equation
with the central cornea

25. Color vision testing is used to detect all of the following except...
severe dry eye
differentiate between congenital or acquired color blindness
patients who have had corneal refractive surgery
central corneal thickness

26. In evaluating an axial length scan - the retinal echo must be...
20
to the left of the scleral and orbital echoes
red - green - and blue
the appearance of dry spots

27. Which eye structure is responsible for color vision?
rods
a tall - central spike with only one peak and smaller spikes on either site
that the sound beam is directed to the optic disc and the measurement is incorrect
shortened axial length due to compression

28. This is not evaluated using rose Bengal except...
are based on the same general equation
before starting school
dacryocystitis
corneal endothelial drop-out

29. A rose bengal does not require the use of...
the appearance of dry spots
infrared
the cobalt blue filter
corneal endothelial drop-out

30. The Schirmer's test might be indicated in all of the following except...
having them trace the number/figure
dacryocystitis
rods
3.0 D

31. Acquired color vision defects...
can often be cured if the causative factor is eliminated
pressing on the globe too hard with the probe
severe dry eye
narrow angles may precipitate an angle-closure glaucoma attack

32. Rose bengal is...
a tall - central spike with only one peak and smaller spikes on either site
a staining agent
a narrow angle and bowed iris cast a shadow on the iris
rods

33. The axial length of the eye is important in the calculation of...
ultrasound
reflex tears
IOL power
A Schirmer's test of 10 mm or more is considered normal.

34. Color vision defects in children are frequently detected among those with...
posterior subcapsular cataract
for screening purposes - such as job applications
the use of an anesthetic
reading disabilities

35. Pachymetry readings are routinely taken prior to...
narrow angles may precipitate an angle-closure glaucoma attack
the defect tends to remain stable over time
a staining agent
refractive surgery

36. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
10 seconds
focus can he moved off-axis to obtain a clear reading
the use of an anesthetic

37. 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
that the sound beam is directed to the optic disc and the measurement is incorrect
the defect tends to remain stable over time
0.3 mm

38. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
IOL power
patient wearing spectacles
reading disabilities
reflex tears

39. Which of the following should be color-vision tested one eye at a time?
one-fourth
the appearance of dry spots
suspected acquired color defect
2 to 3 seconds

40. Estimating the anterior chamber depth with a penlight works because...
refractive error
a narrow angle and bowed iris cast a shadow on the iris
one-fourth
expensive equipment

41. It is important to estimate the anterior chamber depth prior to dilation because...
'test eye'
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable
can often be cured if the causative factor is eliminated

42. Schirmer's test II is used to measure...
normal tearing
10 seconds
rods
with the central cornea

43. Measuring time for the Schirmer's test is...
a tall - central spike with only one peak and smaller spikes on either site
5 minutes
both eyes equally
the use of an anesthetic

44. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
before starting school
reflex tears
refractive error

45. When positioning the IOLMaster for the axial length reading...
for screening purposes - such as job applications
focus can he moved off-axis to obtain a clear reading
to have little or no shadow
5 minutes

46. 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)...
reading disabilities
A-constant
ultrasound
A Schirmer's test of 10 mm or more is considered normal.

47. Young children can be tested using the color plates by...
with the central cornea
having them trace the number/figure
0.3 mm
desired postoperative refraction

48. Illumination for the color plates test...
varies according to the type of test administered
before starting school
more males than females
5 minutes

49. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
can often be cured if the causative factor is eliminated
20
shine the light flatly from the side - in the plane of the iris
focus can he moved off-axis to obtain a clear reading

50. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
2.0 or more
to the left of the scleral and orbital echoes
the defect tends to remain stable over time
ultrasound