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. Hereditary color vision defects affect...
more males than females
2 to 3 seconds
suspected acquired color defect
a narrow angle and bowed iris cast a shadow on the iris

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
red - green - and blue
patients who have had corneal refractive surgery
central corneal thickness
both eyes equally

3. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
545 pm
expensive equipment
A-constant

4. Laser interferometry uses which type of laser light?
2 to 3 seconds
expensive equipment
to have little or no shadow
infrared

5. 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
varies according to the type of test
remove the instrument from use
corneal endothelial drop-out

6. Schirmer's test I is used to measure...
is acceptable
one-fourth
the use of an anesthetic
reflex tears

7. A patient with which of the following potential diagnoses would be tested with bengal?
suspected acquired color defect
varies according to the type of test
3.0 D
severe dry eye

8. When should a child have his or her color vision checked?
the patient is shown a sample that is discernable to normal and abnormal alike
before starting school
having them trace the number/figure
IOL power

9. The difference between Schirmer's test I and II is...
varies according to the type of test
the use of an anesthetic
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

10. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris
both eyes equally

11. When using a penlight to estimate anterior chamber depth - an open angle would appear...
differentiate between congenital or acquired color blindness
to have little or no shadow
dacryocystitis
'test eye'

12. The Ishihara color plates are useful...
decrease in vision due to glare conditions
for screening purposes - such as job applications
'test eye'
patients who have had corneal refractive surgery

13. Rose bengal is...
a staining agent
normal tearing
a narrow angle and bowed iris cast a shadow on the iris
central corneal thickness

14. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
with the central cornea
expensive equipment
20

15. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
one-fourth
varies according to the type of test administered
severe dry eye

16. When performing a brightness acuity glare test - it is best to do which of the following?
IOL power
Allow the patient to adjust to the light level before reading the letters.
'test eye'
posterior subcapsular cataract

17. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
reflex tears
desired postoperative refraction
more males than females

18. Schirmer's test II is used to measure...
patient wearing spectacles
normal tearing
posterior subcapsular cataract
ultrasound

19. Glare testing is used to identify...
decrease in vision due to glare conditions
a malingerer may invent a number - thus identifying him- or herself
expensive equipment
A-constant

20. A TBUT of which of the following would indicate tear film dysfunction?
5 minutes
a narrow angle and bowed iris cast a shadow on the iris
both eyes equally
10 seconds

21. Color vision defects in children are frequently detected among those with...
a tall - central spike with only one peak and smaller spikes on either site
to have little or no shadow
A Schirmer's test of 10 mm or more is considered normal.
reading disabilities

22. The ideal IOLMaster axial length graph is...
varies according to the type of test administered
545 pm
a tall - central spike with only one peak and smaller spikes on either site
10 seconds

23. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
5 minutes
focus can he moved off-axis to obtain a clear reading
one-fourth

24. Acquired color vision defects...
can often be cured if the causative factor is eliminated
dacryocystitis
decrease in vision due to glare conditions
before starting school

25. Illumination for the color plates test...
tear filter papers
corneal endothelial drop-out
having them trace the number/figure
varies according to the type of test administered

26. In evaluating an axial length scan - the retinal echo must be...
severe dry eye
a tall - central spike with only one peak and smaller spikes on either site
to the left of the scleral and orbital echoes
shortened axial length due to compression

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

28. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
to have little or no shadow
desired postoperative refraction
patient wearing spectacles
rods

29. A rose bengal does not require the use of...
shine the light flatly from the side - in the plane of the iris
the cobalt blue filter
varies according to the type of test
infrared

30. When performing the TBUT test - the observer is looking for...
one-fourth
the appearance of dry spots
refractive surgery
red - green - and blue

31. The axial length of the eye is important in the calculation of...
a malingerer may invent a number - thus identifying him- or herself
IOL power
tear filter papers
reflex tears

32. The average central thickness of the human cornea is...
both eyes equally
2.0 or more
545 pm
23 to 24 mm

33. Which eye structure is responsible for color vision?
rods
red - green - and blue
patients who have had corneal refractive surgery
20

34. With the 1OLMaster - the ideal signal-to-noise ratio is...
Allow the patient to adjust to the light level before reading the letters.
2.0 or more
IOL power
suspected acquired color defect

35. Estimating the anterior chamber depth with a penlight works because...
holding the probe perpendicular to the corneal surface
a narrow angle and bowed iris cast a shadow on the iris
narrow beam
reflex tears

36. Color vision testing is used to detect all of the following except...
holding the probe perpendicular to the corneal surface
differentiate between congenital or acquired color blindness
patients who have had corneal refractive surgery
the cobalt blue filter

37. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
posterior subcapsular cataract
blink
20
narrow angles may precipitate an angle-closure glaucoma attack

38. A color plate that shows no obvious number to normal and abnormal alike is useful because...
the cobalt blue filter
a malingerer may invent a number - thus identifying him- or herself
A Schirmer's test of 10 mm or more is considered normal.
differentiate between congenital or acquired color blindness

39. When calculating IOL power - each of the following are necessary except...
the patient should be tested with near correction - if worn
the defect tends to remain stable over time
white to white corneal diameter
posterior subcapsular cataract

40. If a biometry instrument fails to calibrate properly - one should...
the defect tends to remain stable over time
remove the instrument from use
shine the light flatly from the side - in the plane of the iris
holding the probe perpendicular to the corneal surface

41. 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
varies according to the type of test
desired postoperative refraction
A Schirmer's test of 10 mm or more is considered normal.

42. Hereditary color defects most often fall into which category?
Allow the patient to adjust to the light level before reading the letters.
the patient should be tested with near correction - if worn
red-green
white to white corneal diameter

43. Hereditary color vision defects usually affect...
both eyes equally
having them trace the number/figure
to the left of the scleral and orbital echoes
0.3 mm

44. The Schirmer's test might be indicated in all of the following except...
desired postoperative refraction
dacryocystitis
white to white corneal diameter
corneal endothelial drop-out

45. 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?
one-fourth
reflex tears
to the left of the scleral and orbital echoes
the use of an anesthetic

46. It is important to estimate the anterior chamber depth prior to dilation because...
3.0 D
to have little or no shadow
holding the probe perpendicular to the corneal surface
narrow angles may precipitate an angle-closure glaucoma attack

47. In test a patient with the color pseudoisochromatic plates...
the patient is shown a sample that is discernable to normal and abnormal alike
the patient should be tested with near correction - if worn
reflex tears
refractive error

48. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
IOL power
red-green
545 pm
is acceptable

49. 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?
0.3 mm
differentiate between congenital or acquired color blindness
narrow beam
545 pm

50. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
the defect tends to remain stable over time
desired postoperative refraction
5 minutes