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. The IOLMaster eliminates which of the following sources of error?
blink
shortened axial length due to compression
both eyes equally
the defect tends to remain stable over time

2. A TBUT of which of the following would indicate tear film dysfunction?
is acceptable
10 seconds
patients who have had corneal refractive surgery
red - green - and blue

3. The difference between Schirmer's test I and II is...
the use of an anesthetic
the patient should be tested with near correction - if worn
3.0 D
remove the instrument from use

4. Pachymetry readings are routinely taken prior to...
the patient should be tested with near correction - if worn
refractive surgery
the appearance of dry spots
remove the instrument from use

5. Rose bengal is...
a tall - central spike with only one peak and smaller spikes on either site
can often be cured if the causative factor is eliminated
a staining agent
more males than females

6. In test a patient with the color pseudoisochromatic plates...
2 to 3 seconds
to the left of the scleral and orbital echoes
the patient should be tested with near correction - if worn
20

7. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
to have little or no shadow
normal tearing
patients who have had corneal refractive surgery
20

8. When positioning the IOLMaster for the axial length reading...
desired postoperative refraction
narrow beam
focus can he moved off-axis to obtain a clear reading
for screening purposes - such as job applications

9. In which of the following would glare testing be most appropriate?
refractive error
varies according to the type of test administered
expensive equipment
posterior subcapsular cataract

10. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
to the left of the scleral and orbital echoes
10 seconds
with the central cornea

11. It is important to estimate the anterior chamber depth prior to dilation because...
infrared
before starting school
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack

12. Acquired color vision defects...
that the sound beam is directed to the optic disc and the measurement is incorrect
can often be cured if the causative factor is eliminated
the defect tends to remain stable over time
narrow beam

13. When using color plates - a score indicates abnormal color vision...
differentiate between congenital or acquired color blindness
varies according to the type of test
23 to 24 mm
the appearance of dry spots

14. The axial length of the eye is important in the calculation of...
IOL power
expensive equipment
shine the light flatly from the side - in the plane of the iris
is acceptable

15. This is not evaluated using rose Bengal except...
blink
are based on the same general equation
corneal endothelial drop-out
545 pm

16. Hereditary color vision defects usually affect...
reflex tears
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally
5 minutes

17. The Schirmer's test might be indicated in all of the following except...
the patient is shown a sample that is discernable to normal and abnormal alike
dacryocystitis
10 seconds
decrease in vision due to glare conditions

18. Hereditary color defects most often fall into which category?
central corneal thickness
red-green
to have little or no shadow
blink

19. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
ultrasound
before starting school
varies according to the type of test administered

20. A patient with which of the following potential diagnoses would be tested with bengal?
focus can he moved off-axis to obtain a clear reading
severe dry eye
refractive surgery
dacryocystitis

21. A rose bengal does not require the use of...
5 minutes
refractive surgery
ultrasound
the cobalt blue filter

22. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
refractive surgery
shine the light flatly from the side - in the plane of the iris
2.0 or more
corneal endothelial drop-out

23. In evaluating an axial length scan - the retinal echo must be...
that the sound beam is directed to the optic disc and the measurement is incorrect
to the left of the scleral and orbital echoes
Allow the patient to adjust to the light level before reading the letters.
patients who have had corneal refractive surgery

24. Estimating the anterior chamber depth with a penlight works because...
normal tearing
the appearance of dry spots
blink
a narrow angle and bowed iris cast a shadow on the iris

25. One of the keys in accurate pachymetry is...
'test eye'
narrow angles may precipitate an angle-closure glaucoma attack
shine the light flatly from the side - in the plane of the iris
holding the probe perpendicular to the corneal surface

26. When performing a brightness acuity glare test - it is best to do which of the following?
the cobalt blue filter
Allow the patient to adjust to the light level before reading the letters.
white to white corneal diameter
10 seconds

27. When performing pachymetry prior to refractive surgery - it is generally best to begin...
the patient is shown a sample that is discernable to normal and abnormal alike
with the central cornea
to the left of the scleral and orbital echoes
5 minutes

28. When performing the TBUT test - the observer is looking for...
infrared
that the sound beam is directed to the optic disc and the measurement is incorrect
the appearance of dry spots
red - green - and blue

29. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
decrease in vision due to glare conditions
refractive surgery
2.0 or more

30. The average central thickness of the human cornea is...
shine the light flatly from the side - in the plane of the iris
a malingerer may invent a number - thus identifying him- or herself
'test eye'
545 pm

31. Which eye structure is responsible for color vision?
the cobalt blue filter
infrared
decrease in vision due to glare conditions
rods

32. When calculating intraocular lens (IOL) powers - one must enter...
decrease in vision due to glare conditions
desired postoperative refraction
the appearance of dry spots
are based on the same general equation

33. Color vision testing is used to detect all of the following except...
blink
refractive error
holding the probe perpendicular to the corneal surface
differentiate between congenital or acquired color blindness

34. When should a child have his or her color vision checked?
desired postoperative refraction
before starting school
for screening purposes - such as job applications
can often be cured if the causative factor is eliminated

35. The ideal IOLMaster axial length graph is...
infrared
dacryocystitis
a tall - central spike with only one peak and smaller spikes on either site
a narrow angle and bowed iris cast a shadow on the iris

36. Measuring corneal thickness via nonoptical pachymetry involves the use of...
narrow angles may precipitate an angle-closure glaucoma attack
with the central cornea
ultrasound
one-fourth

37. Young children can be tested using the color plates by...
tear filter papers
rods
having them trace the number/figure
shine the light flatly from the side - in the plane of the iris

38. When calculating IOL power - each of the following are necessary except...
IOL power
rods
varies according to the type of test administered
white to white corneal diameter

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)...
central corneal thickness
A-constant
a tall - central spike with only one peak and smaller spikes on either site
0.3 mm

40. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
one-fourth
shortened axial length due to compression
that the sound beam is directed to the optic disc and the measurement is incorrect
patient wearing spectacles

41. 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?
3.0 D
0.3 mm
the patient is shown a sample that is discernable to normal and abnormal alike
545 pm

42. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the cobalt blue filter
the defect tends to remain stable over time
differentiate between congenital or acquired color blindness
pressing on the globe too hard with the probe

43. The axial length of an average adult eye is...
refractive surgery
infrared
23 to 24 mm
0.3 mm

44. Color vision defects in children are frequently detected among those with...
the patient should be tested with near correction - if worn
reading disabilities
expensive equipment
having them trace the number/figure

45. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
before starting school
'test eye'
the defect tends to remain stable over time
is acceptable

46. Schirmer's test I is used to measure...
reflex tears
infrared
Allow the patient to adjust to the light level before reading the letters.
red - green - and blue

47. Just prior to the beginning of the TBUT test - the patient is instructed to...
desired postoperative refraction
blink
for screening purposes - such as job applications
a staining agent

48. 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
a tall - central spike with only one peak and smaller spikes on either site
the patient should be tested with near correction - if worn
patients who have had corneal refractive surgery

49. Before proceeding with the actual color plate test...
the appearance of dry spots
the use of an anesthetic
a tall - central spike with only one peak and smaller spikes on either site
the patient is shown a sample that is discernable to normal and abnormal alike

50. Almost all of the formulas for calculating IOL power...
patients who have had corneal refractive surgery
to the left of the scleral and orbital echoes
posterior subcapsular cataract
are based on the same general equation