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. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
3.0 D
20
the patient is shown a sample that is discernable to normal and abnormal alike
that the sound beam is directed to the optic disc and the measurement is incorrect

2. 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
23 to 24 mm
before starting school
can often be cured if the causative factor is eliminated

3. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
shine the light flatly from the side - in the plane of the iris
before starting school
to have little or no shadow

4. Which eye structure is responsible for color vision?
pressing on the globe too hard with the probe
remove the instrument from use
rods
a staining agent

5. This is not evaluated using rose Bengal except...
the appearance of dry spots
refractive error
corneal endothelial drop-out
suspected acquired color defect

6. When performing a brightness acuity glare test - it is best to do which of the following?
refractive surgery
red-green
a malingerer may invent a number - thus identifying him- or herself
Allow the patient to adjust to the light level before reading the letters.

7. A patient with which of the following potential diagnoses would be tested with bengal?
to have little or no shadow
severe dry eye
patients who have had corneal refractive surgery
20

8. The photosensitive pigments of the eye are sensitive to...
suspected acquired color defect
'test eye'
for screening purposes - such as job applications
red - green - and blue

9. _______ are not used in evaluating tear break-up time (TBUT)
a staining agent
tear filter papers
patient wearing spectacles
a narrow angle and bowed iris cast a shadow on the iris

10. When using a penlight to estimate anterior chamber depth - an open angle would appear...
to the left of the scleral and orbital echoes
to have little or no shadow
a narrow angle and bowed iris cast a shadow on the iris
patients who have had corneal refractive surgery

11. 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
refractive surgery
both eyes equally
545 pm

12. A rose bengal does not require the use of...
a tall - central spike with only one peak and smaller spikes on either site
is acceptable
the cobalt blue filter
holding the probe perpendicular to the corneal surface

13. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
tear filter papers
narrow beam
refractive surgery
can often be cured if the causative factor is eliminated

14. Estimating the anterior chamber depth with a penlight works because...
that the sound beam is directed to the optic disc and the measurement is incorrect
A Schirmer's test of 10 mm or more is considered normal.
normal tearing
a narrow angle and bowed iris cast a shadow on the iris

15. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
before starting school
one-fourth
reflex tears

16. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
red-green
is acceptable
can often be cured if the causative factor is eliminated

17. If a biometry instrument fails to calibrate properly - one should...
more males than females
remove the instrument from use
varies according to the type of test
before starting school

18. Illumination for the color plates test...
shortened axial length due to compression
varies according to the type of test administered
suspected acquired color defect
narrow angles may precipitate an angle-closure glaucoma attack

19. A color plate that shows no obvious number to normal and abnormal alike is useful because...
0.3 mm
expensive equipment
a malingerer may invent a number - thus identifying him- or herself
with the central cornea

20. The IOLMaster evaluates each of the following except...
refractive error
a staining agent
with the central cornea
shine the light flatly from the side - in the plane of the iris

21. Measuring corneal thickness via nonoptical pachymetry involves the use of...
severe dry eye
A-constant
ultrasound
to the left of the scleral and orbital echoes

22. Hereditary color vision defects usually affect...
red-green
both eyes equally
545 pm
having them trace the number/figure

23. Hereditary color vision defects affect...
10 seconds
more males than females
is acceptable
the use of an anesthetic

24. Glare testing is used to identify...
decrease in vision due to glare conditions
both eyes equally
5 minutes
suspected acquired color defect

25. Acquired color vision defects...
can often be cured if the causative factor is eliminated
decrease in vision due to glare conditions
IOL power
both eyes equally

26. Pachymetry readings are routinely taken prior to...
3.0 D
corneal endothelial drop-out
refractive surgery
a staining agent

27. The average central thickness of the human cornea is...
545 pm
posterior subcapsular cataract
23 to 24 mm
is acceptable

28. The IOLMaster eliminates which of the following sources of error?
shortened axial length due to compression
normal tearing
differentiate between congenital or acquired color blindness
23 to 24 mm

29. 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...
pressing on the globe too hard with the probe
blink
that the sound beam is directed to the optic disc and the measurement is incorrect
red - green - and blue

30. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
a malingerer may invent a number - thus identifying him- or herself
ultrasound
before starting school

31. The axial length of an average adult eye is...
a malingerer may invent a number - thus identifying him- or herself
23 to 24 mm
A Schirmer's test of 10 mm or more is considered normal.
severe dry eye

32. 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?
patients who have had corneal refractive surgery
reading disabilities
white to white corneal diameter
0.3 mm

33. When should a child have his or her color vision checked?
2.0 or more
varies according to the type of test
desired postoperative refraction
before starting school

34. 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)...
normal tearing
0.3 mm
to the left of the scleral and orbital echoes
A-constant

35. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
the use of an anesthetic
545 pm
to have little or no shadow

36. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
23 to 24 mm
narrow angles may precipitate an angle-closure glaucoma attack
pressing on the globe too hard with the probe

37. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
are based on the same general equation
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself

38. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
that the sound beam is directed to the optic disc and the measurement is incorrect
central corneal thickness
is acceptable
the patient is shown a sample that is discernable to normal and abnormal alike

39. Rose bengal is...
patient wearing spectacles
more males than females
the use of an anesthetic
a staining agent

40. The Ishihara color plates are useful...
both eyes equally
a narrow angle and bowed iris cast a shadow on the iris
A-constant
for screening purposes - such as job applications

41. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
holding the probe perpendicular to the corneal surface
desired postoperative refraction
refractive surgery

42. 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?
refractive surgery
one-fourth
3.0 D
10 seconds

43. Young children can be tested using the color plates by...
the cobalt blue filter
differentiate between congenital or acquired color blindness
can often be cured if the causative factor is eliminated
having them trace the number/figure

44. When using color plates - a score indicates abnormal color vision...
holding the probe perpendicular to the corneal surface
varies according to the type of test
the appearance of dry spots
differentiate between congenital or acquired color blindness

45. Schirmer's test II is used to measure...
having them trace the number/figure
A Schirmer's test of 10 mm or more is considered normal.
normal tearing
2 to 3 seconds

46. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
the defect tends to remain stable over time
the use of an anesthetic
red - green - and blue

47. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
normal tearing
refractive surgery
more males than females

48. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
normal tearing
the appearance of dry spots
narrow beam

49. Schirmer's test I is used to measure...
the cobalt blue filter
reflex tears
2 to 3 seconds
blink

50. The axial length of the eye is important in the calculation of...
0.3 mm
a staining agent
IOL power
white to white corneal diameter