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 evaluates each of the following except...
refractive error
the use of an anesthetic
pressing on the globe too hard with the probe
0.3 mm

2. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
20
narrow beam
shine the light flatly from the side - in the plane of the iris
rods

3. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
20
expensive equipment
can often be cured if the causative factor is eliminated

4. When positioning the IOLMaster for the axial length reading...
red-green
patient wearing spectacles
can often be cured if the causative factor is eliminated
focus can he moved off-axis to obtain a clear reading

5. Hereditary color defects most often fall into which category?
red-green
23 to 24 mm
is acceptable
refractive error

6. In evaluating an axial length scan - the retinal echo must be...
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally
varies according to the type of test
to the left of the scleral and orbital echoes

7. Estimating the anterior chamber depth with a penlight works because...
more males than females
red-green
pressing on the globe too hard with the probe
a narrow angle and bowed iris cast a shadow on the iris

8. 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
2.0 or more
pressing on the globe too hard with the probe
red - green - and blue

9. Young children can be tested using the color plates by...
for screening purposes - such as job applications
2 to 3 seconds
having them trace the number/figure
10 seconds

10. 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?
can often be cured if the causative factor is eliminated
2.0 or more
one-fourth
the cobalt blue filter

11. An A-Sean can he artificially shortened due to...
545 pm
to have little or no shadow
pressing on the globe too hard with the probe
reading disabilities

12. If a biometry instrument fails to calibrate properly - one should...
one-fourth
a narrow angle and bowed iris cast a shadow on the iris
remove the instrument from use
varies according to the type of test

13. A TBUT of which of the following would indicate tear film dysfunction?
more males than females
10 seconds
white to white corneal diameter
blink

14. The type of pachymetry used to evaluate a glaucoma suspect is...
expensive equipment
A-constant
central corneal thickness
posterior subcapsular cataract

15. Color vision testing is used to detect all of the following except...
differentiate between congenital or acquired color blindness
before starting school
the cobalt blue filter
narrow angles may precipitate an angle-closure glaucoma attack

16. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
infrared
the appearance of dry spots
a tall - central spike with only one peak and smaller spikes on either site

17. The axial length of an average adult eye is...
refractive surgery
to have little or no shadow
a staining agent
23 to 24 mm

18. A color plate that shows no obvious number to normal and abnormal alike is useful because...
reading disabilities
a malingerer may invent a number - thus identifying him- or herself
decrease in vision due to glare conditions
10 seconds

19. Before proceeding with the actual color plate test...
white to white corneal diameter
the appearance of dry spots
can often be cured if the causative factor is eliminated
the patient is shown a sample that is discernable to normal and abnormal alike

20. Laser interferometry uses which type of laser light?
shortened axial length due to compression
refractive surgery
infrared
the appearance of dry spots

21. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
infrared
3.0 D
2.0 or more
patients who have had corneal refractive surgery

22. Hereditary color vision defects usually affect...
both eyes equally
holding the probe perpendicular to the corneal surface
rods
infrared

23. When calculating IOL power - each of the following are necessary except...
having them trace the number/figure
dacryocystitis
white to white corneal diameter
is acceptable

24. The photosensitive pigments of the eye are sensitive to...
A Schirmer's test of 10 mm or more is considered normal.
red - green - and blue
reading disabilities
0.3 mm

25. How long should the patient be given to recognize the figure in a color plate?
the appearance of dry spots
refractive error
both eyes equally
2 to 3 seconds

26. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
can often be cured if the causative factor is eliminated
patient wearing spectacles
is acceptable
more males than females

27. When should a child have his or her color vision checked?
before starting school
IOL power
with the central cornea
a tall - central spike with only one peak and smaller spikes on either site

28. Measuring time for the Schirmer's test is...
severe dry eye
5 minutes
the defect tends to remain stable over time
differentiate between congenital or acquired color blindness

29. 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)...
can often be cured if the causative factor is eliminated
A-constant
ultrasound
white to white corneal diameter

30. Schirmer's test II is used to measure...
severe dry eye
with the central cornea
white to white corneal diameter
normal tearing

31. Pachymetry readings are routinely taken prior to...
tear filter papers
refractive error
pressing on the globe too hard with the probe
refractive surgery

32. The difference between Schirmer's test I and II is...
desired postoperative refraction
a staining agent
remove the instrument from use
the use of an anesthetic

33. Just prior to the beginning of the TBUT test - the patient is instructed to...
posterior subcapsular cataract
one-fourth
blink
reading disabilities

34. One of the keys in accurate pachymetry is...
expensive equipment
holding the probe perpendicular to the corneal surface
is acceptable
a narrow angle and bowed iris cast a shadow on the iris

35. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
20
refractive surgery
infrared

36. In test a patient with the color pseudoisochromatic plates...
a malingerer may invent a number - thus identifying him- or herself
a tall - central spike with only one peak and smaller spikes on either site
rods
the patient should be tested with near correction - if worn

37. Almost all of the formulas for calculating IOL power...
patient wearing spectacles
shortened axial length due to compression
are based on the same general equation
both eyes equally

38. When using color plates - a score indicates abnormal color vision...
the patient is shown a sample that is discernable to normal and abnormal alike
varies according to the type of test
normal tearing
A-constant

39. It is important to estimate the anterior chamber depth prior to dilation because...
differentiate between congenital or acquired color blindness
20
narrow angles may precipitate an angle-closure glaucoma attack
a staining agent

40. Glare testing is used to identify...
desired postoperative refraction
545 pm
decrease in vision due to glare conditions
A-constant

41. The ideal IOLMaster axial length graph is...
Allow the patient to adjust to the light level before reading the letters.
expensive equipment
the cobalt blue filter
a tall - central spike with only one peak and smaller spikes on either site

42. Schirmer's test I is used to measure...
reflex tears
varies according to the type of test
10 seconds
desired postoperative refraction

43. Schirmer's test does not require _____ except Test strips
expensive equipment
Allow the patient to adjust to the light level before reading the letters.
for screening purposes - such as job applications
2.0 or more

44. A rose bengal does not require the use of...
differentiate between congenital or acquired color blindness
the defect tends to remain stable over time
the cobalt blue filter
2.0 or more

45. A patient with which of the following potential diagnoses would be tested with bengal?
white to white corneal diameter
severe dry eye
tear filter papers
to have little or no shadow

46. Rose bengal is...
varies according to the type of test
having them trace the number/figure
refractive error
a staining agent

47. 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...
having them trace the number/figure
5 minutes
red-green
that the sound beam is directed to the optic disc and the measurement is incorrect

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

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49. Color vision defects in children are frequently detected among those with...
focus can he moved off-axis to obtain a clear reading
a malingerer may invent a number - thus identifying him- or herself
reading disabilities
with the central cornea

50. The average central thickness of the human cornea is...
one-fourth
central corneal thickness
corneal endothelial drop-out
545 pm