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. Young children can be tested using the color plates by...
having them trace the number/figure
the patient is shown a sample that is discernable to normal and abnormal alike
'test eye'
varies according to the type of test administered

2. 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...
holding the probe perpendicular to the corneal surface
that the sound beam is directed to the optic disc and the measurement is incorrect
patients who have had corneal refractive surgery
are based on the same general equation

3. The IOLMaster evaluates each of the following except...
corneal endothelial drop-out
refractive error
red-green
the defect tends to remain stable over time

4. Schirmer's test does not require _____ except Test strips
red-green
20
before starting school
expensive equipment

5. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
decrease in vision due to glare conditions
red - green - and blue
normal tearing

6. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to have little or no shadow
the cobalt blue filter
a narrow angle and bowed iris cast a shadow on the iris
refractive surgery

7. Measuring time for the Schirmer's test is...
a staining agent
varies according to the type of test administered
5 minutes
red - green - and blue

8. Just prior to the beginning of the TBUT test - the patient is instructed to...
23 to 24 mm
shortened axial length due to compression
blink
545 pm

9. Rose bengal is...
severe dry eye
to the left of the scleral and orbital echoes
a staining agent
narrow angles may precipitate an angle-closure glaucoma attack

10. Schirmer's test II is used to measure...
normal tearing
0.3 mm
patient wearing spectacles
differentiate between congenital or acquired color blindness

11. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
2 to 3 seconds
remove the instrument from use
0.3 mm

12. 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
the patient is shown a sample that is discernable to normal and abnormal alike
pressing on the globe too hard with the probe
before starting school

13. Laser interferometry uses which type of laser light?
refractive surgery
infrared
a staining agent
A Schirmer's test of 10 mm or more is considered normal.

14. Schirmer's test I is used to measure...
a staining agent
to the left of the scleral and orbital echoes
the cobalt blue filter
reflex tears

15. A rose bengal does not require the use of...
expensive equipment
the cobalt blue filter
red-green
holding the probe perpendicular to the corneal surface

16. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
remove the instrument from use
a tall - central spike with only one peak and smaller spikes on either site
refractive error

17. A TBUT of which of the following would indicate tear film dysfunction?
dacryocystitis
10 seconds
remove the instrument from use
narrow angles may precipitate an angle-closure glaucoma attack

18. The type of pachymetry used to evaluate a glaucoma suspect is...
shine the light flatly from the side - in the plane of the iris
a narrow angle and bowed iris cast a shadow on the iris
one-fourth
central corneal thickness

19. When calculating IOL power - each of the following are necessary except...
to the left of the scleral and orbital echoes
are based on the same general equation
white to white corneal diameter
A Schirmer's test of 10 mm or more is considered normal.

20. The average central thickness of the human cornea is...
545 pm
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
'test eye'

21. Illumination for the color plates test...
A-constant
A Schirmer's test of 10 mm or more is considered normal.
3.0 D
varies according to the type of test administered

22. When performing pachymetry prior to refractive surgery - it is generally best to begin...
more males than females
20
shine the light flatly from the side - in the plane of the iris
with the central cornea

23. The Ishihara color plates are useful...
more males than females
for screening purposes - such as job applications
narrow beam
20

24. When positioning the IOLMaster for the axial length reading...
patients who have had corneal refractive surgery
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading
5 minutes

25. The axial length of the eye is important in the calculation of...
refractive surgery
decrease in vision due to glare conditions
IOL power
0.3 mm

26. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
0.3 mm
rods
blink
patients who have had corneal refractive surgery

27. Glare testing is used to identify...
decrease in vision due to glare conditions
blink
to the left of the scleral and orbital echoes
shortened axial length due to compression

28. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
to have little or no shadow
narrow beam
red - green - and blue
the patient should be tested with near correction - if worn

29. This is not evaluated using rose Bengal except...
the defect tends to remain stable over time
corneal endothelial drop-out
a staining agent
central corneal thickness

30. The ideal IOLMaster axial length graph is...
can often be cured if the causative factor is eliminated
23 to 24 mm
a tall - central spike with only one peak and smaller spikes on either site
5 minutes

31. The photosensitive pigments of the eye are sensitive to...
white to white corneal diameter
refractive surgery
red - green - and blue
ultrasound

32. Color vision defects in children are frequently detected among those with...
reading disabilities
545 pm
for screening purposes - such as job applications
ultrasound

33. Hereditary color defects most often fall into which category?
pressing on the globe too hard with the probe
Allow the patient to adjust to the light level before reading the letters.
red-green
shine the light flatly from the side - in the plane of the iris

34. Hereditary color vision defects usually affect...
both eyes equally
infrared
narrow beam
that the sound beam is directed to the optic disc and the measurement is incorrect

35. _______ are not used in evaluating tear break-up time (TBUT)
shine the light flatly from the side - in the plane of the iris
3.0 D
the cobalt blue filter
tear filter papers

36. An A-Sean can he artificially shortened due to...
shine the light flatly from the side - in the plane of the iris
red - green - and blue
suspected acquired color defect
pressing on the globe too hard with the probe

37. 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?
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth
0.3 mm
expensive equipment

38. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
shortened axial length due to compression
ultrasound
to have little or no shadow

39. 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)...
narrow beam
refractive error
the patient should be tested with near correction - if worn
A-constant

40. It is important to estimate the anterior chamber depth prior to dilation because...
focus can he moved off-axis to obtain a clear reading
narrow angles may precipitate an angle-closure glaucoma attack
rods
holding the probe perpendicular to the corneal surface

41. When should a child have his or her color vision checked?
narrow beam
before starting school
2.0 or more
a malingerer may invent a number - thus identifying him- or herself

42. Hereditary color vision defects affect...
more males than females
rods
white to white corneal diameter
varies according to the type of test administered

43. In evaluating an axial length scan - the retinal echo must be...
having them trace the number/figure
red - green - and blue
a tall - central spike with only one peak and smaller spikes on either site
to the left of the scleral and orbital echoes

44. In which of the following would glare testing be most appropriate?
differentiate between congenital or acquired color blindness
2 to 3 seconds
suspected acquired color defect
posterior subcapsular cataract

45. Measuring corneal thickness via nonoptical pachymetry involves the use of...
the cobalt blue filter
central corneal thickness
ultrasound
23 to 24 mm

46. When performing the TBUT test - the observer is looking for...
one-fourth
the patient is shown a sample that is discernable to normal and abnormal alike
the appearance of dry spots
reading disabilities

47. When using color plates - a score indicates abnormal color vision...
decrease in vision due to glare conditions
varies according to the type of test
A-constant
central corneal thickness

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

49. Estimating the anterior chamber depth with a penlight works because...
expensive equipment
a narrow angle and bowed iris cast a shadow on the iris
a staining agent
'test eye'

50. How long should the patient be given to recognize the figure in a color plate?
pressing on the globe too hard with the probe
having them trace the number/figure
before starting school
2 to 3 seconds