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. Schirmer's test II is used to measure...
having them trace the number/figure
normal tearing
0.3 mm
varies according to the type of test administered

2. The axial length of an average adult eye is...
10 seconds
differentiate between congenital or acquired color blindness
23 to 24 mm
blink

3. When calculating IOL power - each of the following are necessary except...
corneal endothelial drop-out
white to white corneal diameter
varies according to the type of test
a malingerer may invent a number - thus identifying him- or herself

4. A rose bengal does not require the use of...
shine the light flatly from the side - in the plane of the iris
normal tearing
A-constant
the cobalt blue filter

5. If a biometry instrument fails to calibrate properly - one should...
a narrow angle and bowed iris cast a shadow on the iris
the cobalt blue filter
remove the instrument from use
red-green

6. In which of the following would glare testing be most appropriate?
before starting school
holding the probe perpendicular to the corneal surface
posterior subcapsular cataract
reading disabilities

7. Measuring corneal thickness via nonoptical pachymetry involves the use of...
23 to 24 mm
ultrasound
holding the probe perpendicular to the corneal surface
both eyes equally

8. When calculating intraocular lens (IOL) powers - one must enter...
Allow the patient to adjust to the light level before reading the letters.
differentiate between congenital or acquired color blindness
desired postoperative refraction
remove the instrument from use

9. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
ultrasound
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time

10. The average central thickness of the human cornea is...
545 pm
23 to 24 mm
to have little or no shadow
red-green

11. The ideal IOLMaster axial length graph is...
2 to 3 seconds
the appearance of dry spots
pressing on the globe too hard with the probe
a tall - central spike with only one peak and smaller spikes on either site

12. Color vision testing is used to detect all of the following except...
remove the instrument from use
refractive surgery
severe dry eye
differentiate between congenital or acquired color blindness

13. Which eye structure is responsible for color vision?
the cobalt blue filter
corneal endothelial drop-out
20
rods

14. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
10 seconds
refractive error
A-constant

15. _______ are not used in evaluating tear break-up time (TBUT)
to the left of the scleral and orbital echoes
a malingerer may invent a number - thus identifying him- or herself
tear filter papers
are based on the same general equation

16. How long should the patient be given to recognize the figure in a color plate?
varies according to the type of test administered
narrow beam
2 to 3 seconds
a staining agent

17. Rose bengal is...
is acceptable
20
suspected acquired color defect
a staining agent

18. A patient with which of the following potential diagnoses would be tested with bengal?
varies according to the type of test administered
infrared
severe dry eye
red - green - and blue

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

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20. The Ishihara color plates are useful...
corneal endothelial drop-out
for screening purposes - such as job applications
varies according to the type of test
545 pm

21. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
A-constant
decrease in vision due to glare conditions
reflex tears
shine the light flatly from the side - in the plane of the iris

22. When using a penlight to estimate anterior chamber depth - an open angle would appear...
'test eye'
5 minutes
that the sound beam is directed to the optic disc and the measurement is incorrect
to have little or no shadow

23. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
decrease in vision due to glare conditions
narrow beam
0.3 mm
Allow the patient to adjust to the light level before reading the letters.

24. With the 1OLMaster - the ideal signal-to-noise ratio is...
with the central cornea
2.0 or more
for screening purposes - such as job applications
a narrow angle and bowed iris cast a shadow on the iris

25. The type of pachymetry used to evaluate a glaucoma suspect is...
A-constant
2 to 3 seconds
central corneal thickness
infrared

26. When should a child have his or her color vision checked?
before starting school
can often be cured if the causative factor is eliminated
the patient is shown a sample that is discernable to normal and abnormal alike
0.3 mm

27. Just prior to the beginning of the TBUT test - the patient is instructed to...
white to white corneal diameter
blink
shine the light flatly from the side - in the plane of the iris
for screening purposes - such as job applications

28. When using color plates - a score indicates abnormal color vision...
reading disabilities
with the central cornea
varies according to the type of test
more males than females

29. 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
before starting school
A-constant
pressing on the globe too hard with the probe

30. When performing a brightness acuity glare test - it is best to do which of the following?
a narrow angle and bowed iris cast a shadow on the iris
that the sound beam is directed to the optic disc and the measurement is incorrect
with the central cornea
Allow the patient to adjust to the light level before reading the letters.

31. The photosensitive pigments of the eye are sensitive to...
red-green
red - green - and blue
that the sound beam is directed to the optic disc and the measurement is incorrect
posterior subcapsular cataract

32. This is not evaluated using rose Bengal except...
3.0 D
to have little or no shadow
corneal endothelial drop-out
the patient should be tested with near correction - if worn

33. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
patients who have had corneal refractive surgery
varies according to the type of test administered
IOL power

34. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
545 pm
patients who have had corneal refractive surgery
reading disabilities

35. The axial length of the eye is important in the calculation of...
corneal endothelial drop-out
both eyes equally
narrow beam
IOL power

36. Almost all of the formulas for calculating IOL power...
posterior subcapsular cataract
are based on the same general equation
Allow the patient to adjust to the light level before reading the letters.
is acceptable

37. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
red - green - and blue
holding the probe perpendicular to the corneal surface
patients who have had corneal refractive surgery
refractive error

38. One of the keys in accurate pachymetry is...
blink
a tall - central spike with only one peak and smaller spikes on either site
holding the probe perpendicular to the corneal surface
tear filter papers

39. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
expensive equipment
2.0 or more
that the sound beam is directed to the optic disc and the measurement is incorrect

40. Hereditary color defects most often fall into which category?
white to white corneal diameter
IOL power
2 to 3 seconds
red-green

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?
the use of an anesthetic
narrow beam
for screening purposes - such as job applications
0.3 mm

42. Glare testing is used to identify...
varies according to the type of test
IOL power
for screening purposes - such as job applications
decrease in vision due to glare conditions

43. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
corneal endothelial drop-out
the defect tends to remain stable over time
before starting school
desired postoperative refraction

44. Before proceeding with the actual color plate test...
reflex tears
the patient is shown a sample that is discernable to normal and abnormal alike
A-constant
expensive equipment

45. Schirmer's test does not require _____ except Test strips
expensive equipment
3.0 D
reflex tears
white to white corneal diameter

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)...
white to white corneal diameter
can often be cured if the causative factor is eliminated
'test eye'
A-constant

47. Estimating the anterior chamber depth with a penlight works because...
3.0 D
a narrow angle and bowed iris cast a shadow on the iris
545 pm
decrease in vision due to glare conditions

48. 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
10 seconds
to the left of the scleral and orbital echoes
20

49. Measuring time for the Schirmer's test is...
for screening purposes - such as job applications
0.3 mm
5 minutes
one-fourth

50. In test a patient with the color pseudoisochromatic plates...
rods
holding the probe perpendicular to the corneal surface
the patient should be tested with near correction - if worn
one-fourth