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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. In test a patient with the color pseudoisochromatic plates...
20
white to white corneal diameter
more males than females
the patient should be tested with near correction - if worn

2. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the use of an anesthetic
patients who have had corneal refractive surgery
that the sound beam is directed to the optic disc and the measurement is incorrect
one-fourth

3. Measuring time for the Schirmer's test is...
5 minutes
tear filter papers
23 to 24 mm
patients who have had corneal refractive surgery

4. Measuring corneal thickness via nonoptical pachymetry involves the use of...
tear filter papers
both eyes equally
before starting school
ultrasound

5. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
a narrow angle and bowed iris cast a shadow on the iris
is acceptable
posterior subcapsular cataract
a malingerer may invent a number - thus identifying him- or herself

6. Hereditary color defects most often fall into which category?
varies according to the type of test
ultrasound
is acceptable
red-green

7. The Ishihara color plates are useful...
can often be cured if the causative factor is eliminated
normal tearing
for screening purposes - such as job applications
to the left of the scleral and orbital echoes

8. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
tear filter papers
red - green - and blue
the patient should be tested with near correction - if worn

9. A color plate that shows no obvious number to normal and abnormal alike is useful because...
one-fourth
23 to 24 mm
a malingerer may invent a number - thus identifying him- or herself
severe dry eye

10. How long should the patient be given to recognize the figure in a color plate?
red - green - and blue
2 to 3 seconds
23 to 24 mm
a narrow angle and bowed iris cast a shadow on the iris

11. One of the keys in accurate pachymetry is...
ultrasound
IOL power
narrow angles may precipitate an angle-closure glaucoma attack
holding the probe perpendicular to the corneal surface

12. Color vision testing is used to detect all of the following except...
IOL power
differentiate between congenital or acquired color blindness
narrow angles may precipitate an angle-closure glaucoma attack
to the left of the scleral and orbital echoes

13. Before proceeding with the actual color plate test...
the use of an anesthetic
the patient is shown a sample that is discernable to normal and abnormal alike
pressing on the globe too hard with the probe
expensive equipment

14. Hereditary color vision defects affect...
shortened axial length due to compression
shine the light flatly from the side - in the plane of the iris
23 to 24 mm
more males than females

15. The average central thickness of the human cornea is...
545 pm
patients who have had corneal refractive surgery
desired postoperative refraction
2.0 or more

16. Almost all of the formulas for calculating IOL power...
differentiate between congenital or acquired color blindness
are based on the same general equation
the patient is shown a sample that is discernable to normal and abnormal alike
patient wearing spectacles

17. A rose bengal does not require the use of...
narrow angles may precipitate an angle-closure glaucoma attack
patients who have had corneal refractive surgery
the cobalt blue filter
normal tearing

18. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
varies according to the type of test administered
to have little or no shadow
20
the defect tends to remain stable over time

19. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
infrared
one-fourth
shine the light flatly from the side - in the plane of the iris
rods

20. 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
with the central cornea
dacryocystitis
white to white corneal diameter

21. 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?
2.0 or more
focus can he moved off-axis to obtain a clear reading
white to white corneal diameter
0.3 mm

22. Young children can be tested using the color plates by...
A-constant
having them trace the number/figure
one-fourth
5 minutes

23. Color vision defects in children are frequently detected among those with...
reading disabilities
red-green
to the left of the scleral and orbital echoes
focus can he moved off-axis to obtain a clear reading

24. When performing a brightness acuity glare test - it is best to do which of the following?
remove the instrument from use
more males than females
shortened axial length due to compression
Allow the patient to adjust to the light level before reading the letters.

25. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
patients who have had corneal refractive surgery
for screening purposes - such as job applications
23 to 24 mm

26. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
focus can he moved off-axis to obtain a clear reading
varies according to the type of test
shortened axial length due to compression

27. _______ are not used in evaluating tear break-up time (TBUT)
having them trace the number/figure
expensive equipment
Allow the patient to adjust to the light level before reading the letters.
tear filter papers

28. Rose bengal is...
the use of an anesthetic
differentiate between congenital or acquired color blindness
a staining agent
5 minutes

29. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
patients who have had corneal refractive surgery
A-constant
focus can he moved off-axis to obtain a clear reading

30. Schirmer's test I is used to measure...
23 to 24 mm
rods
reflex tears
the patient is shown a sample that is discernable to normal and abnormal alike

31. It is important to estimate the anterior chamber depth prior to dilation because...
shine the light flatly from the side - in the plane of the iris
a staining agent
the cobalt blue filter
narrow angles may precipitate an angle-closure glaucoma attack

32. Pachymetry readings are routinely taken prior to...
ultrasound
refractive surgery
red-green
patients who have had corneal refractive surgery

33. When calculating intraocular lens (IOL) powers - one must enter...
'test eye'
the patient should be tested with near correction - if worn
dacryocystitis
desired postoperative refraction

34. Laser interferometry uses which type of laser light?
for screening purposes - such as job applications
0.3 mm
are based on the same general equation
infrared

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

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36. Hereditary color vision defects usually affect...
decrease in vision due to glare conditions
narrow angles may precipitate an angle-closure glaucoma attack
both eyes equally
severe dry eye

37. Schirmer's test II is used to measure...
the patient is shown a sample that is discernable to normal and abnormal alike
expensive equipment
one-fourth
normal tearing

38. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
blink
Allow the patient to adjust to the light level before reading the letters.
desired postoperative refraction

39. When should a child have his or her color vision checked?
severe dry eye
before starting school
the appearance of dry spots
reflex tears

40. The difference between Schirmer's test I and II is...
the use of an anesthetic
Allow the patient to adjust to the light level before reading the letters.
for screening purposes - such as job applications
more males than females

41. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
more males than females
A Schirmer's test of 10 mm or more is considered normal.
a malingerer may invent a number - thus identifying him- or herself

42. The IOLMaster evaluates each of the following except...
the patient should be tested with near correction - if worn
narrow beam
before starting school
refractive error

43. Which eye structure is responsible for color vision?
pressing on the globe too hard with the probe
both eyes equally
10 seconds
rods

44. Glare testing is used to identify...
dacryocystitis
decrease in vision due to glare conditions
before starting school
A-constant

45. 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)...
refractive surgery
A-constant
5 minutes
is acceptable

46. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
2 to 3 seconds
545 pm
'test eye'

47. If a biometry instrument fails to calibrate properly - one should...
0.3 mm
remove the instrument from use
expensive equipment
desired postoperative refraction

48. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
infrared
pressing on the globe too hard with the probe
with the central cornea

49. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
a malingerer may invent a number - thus identifying him- or herself
shortened axial length due to compression
reading disabilities

50. The type of pachymetry used to evaluate a glaucoma suspect is...
the patient should be tested with near correction - if worn
holding the probe perpendicular to the corneal surface
varies according to the type of test
central corneal thickness