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. When performing a brightness acuity glare test - it is best to do which of the following?
Allow the patient to adjust to the light level before reading the letters.
shortened axial length due to compression
a narrow angle and bowed iris cast a shadow on the iris
pressing on the globe too hard with the probe

2. _______ are not used in evaluating tear break-up time (TBUT)
narrow beam
refractive surgery
a staining agent
tear filter papers

3. 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?
white to white corneal diameter
varies according to the type of test
shine the light flatly from the side - in the plane of the iris
one-fourth

4. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
A-constant
varies according to the type of test
blink

5. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
that the sound beam is directed to the optic disc and the measurement is incorrect
pressing on the globe too hard with the probe
ultrasound

6. Illumination for the color plates test...
central corneal thickness
23 to 24 mm
to have little or no shadow
varies according to the type of test administered

7. Pachymetry readings are routinely taken prior to...
refractive surgery
can often be cured if the causative factor is eliminated
0.3 mm
having them trace the number/figure

8. When using color plates - a score indicates abnormal color vision...
3.0 D
varies according to the type of test
patient wearing spectacles
a narrow angle and bowed iris cast a shadow on the iris

9. When performing the TBUT test - the observer is looking for...
the use of an anesthetic
IOL power
the appearance of dry spots
ultrasound

10. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
reflex tears
shine the light flatly from the side - in the plane of the iris
ultrasound
3.0 D

11. 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)...
patients who have had corneal refractive surgery
A-constant
holding the probe perpendicular to the corneal surface
20

12. The axial length of the eye is important in the calculation of...
IOL power
more males than females
a narrow angle and bowed iris cast a shadow on the iris
ultrasound

13. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
are based on the same general equation
reflex tears
0.3 mm

14. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
2.0 or more
severe dry eye
the patient is shown a sample that is discernable to normal and abnormal alike

15. One of the keys in accurate pachymetry is...
patients who have had corneal refractive surgery
10 seconds
the appearance of dry spots
holding the probe perpendicular to the corneal surface

16. When positioning the IOLMaster for the axial length reading...
varies according to the type of test
2.0 or more
ultrasound
focus can he moved off-axis to obtain a clear reading

17. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
3.0 D
is acceptable
10 seconds

18. In test a patient with the color pseudoisochromatic plates...
patient wearing spectacles
reflex tears
the patient should be tested with near correction - if worn
shine the light flatly from the side - in the plane of the iris

19. Rose bengal is...
white to white corneal diameter
both eyes equally
the defect tends to remain stable over time
a staining agent

20. Schirmer's test II is used to measure...
reflex tears
narrow beam
normal tearing
severe dry eye

21. A color plate that shows no obvious number to normal and abnormal alike is useful because...
A Schirmer's test of 10 mm or more is considered normal.
3.0 D
20
a malingerer may invent a number - thus identifying him- or herself

22. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
can often be cured if the causative factor is eliminated
patient wearing spectacles
20
holding the probe perpendicular to the corneal surface

23. How long should the patient be given to recognize the figure in a color plate?
'test eye'
2 to 3 seconds
with the central cornea
ultrasound

24. Hereditary color vision defects affect...
more males than females
varies according to the type of test administered
to have little or no shadow
are based on the same general equation

25. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
blink
refractive surgery
pressing on the globe too hard with the probe

26. The IOLMaster evaluates each of the following except...
refractive error
red-green
differentiate between congenital or acquired color blindness
blink

27. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
ultrasound
for screening purposes - such as job applications
before starting school

28. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
5 minutes
is acceptable
'test eye'
pressing on the globe too hard with the probe

29. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
pressing on the globe too hard with the probe
a narrow angle and bowed iris cast a shadow on the iris
'test eye'
patients who have had corneal refractive surgery

30. In which of the following would glare testing be most appropriate?
'test eye'
posterior subcapsular cataract
infrared
central corneal thickness

31. The Ishihara color plates are useful...
the cobalt blue filter
A Schirmer's test of 10 mm or more is considered normal.
for screening purposes - such as job applications
refractive error

32. Just prior to the beginning of the TBUT test - the patient is instructed to...
to the left of the scleral and orbital echoes
to have little or no shadow
infrared
blink

33. An A-Sean can he artificially shortened due to...
infrared
dacryocystitis
red - green - and blue
pressing on the globe too hard with the probe

34. Color vision defects in children are frequently detected among those with...
one-fourth
reading disabilities
IOL power
A-constant

35. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
the appearance of dry spots
tear filter papers
varies according to the type of test administered

36. Measuring time for the Schirmer's test is...
2 to 3 seconds
focus can he moved off-axis to obtain a clear reading
5 minutes
ultrasound

37. The axial length of an average adult eye is...
suspected acquired color defect
23 to 24 mm
for screening purposes - such as job applications
more males than females

38. This is not evaluated using rose Bengal except...
3.0 D
corneal endothelial drop-out
the patient should be tested with near correction - if worn
rods

39. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
before starting school
for screening purposes - such as job applications
shine the light flatly from the side - in the plane of the iris
normal tearing

40. The average central thickness of the human cornea is...
2.0 or more
red-green
545 pm
the defect tends to remain stable over time

41. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
blink
23 to 24 mm
reading disabilities

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

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43. Schirmer's test does not require _____ except Test strips
expensive equipment
posterior subcapsular cataract
5 minutes
for screening purposes - such as job applications

44. Young children can be tested using the color plates by...
545 pm
posterior subcapsular cataract
having them trace the number/figure
are based on the same general equation

45. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
red - green - and blue
red-green
can often be cured if the causative factor is eliminated

46. Schirmer's test I is used to measure...
expensive equipment
normal tearing
5 minutes
reflex tears

47. It is important to estimate the anterior chamber depth prior to dilation because...
20
narrow angles may precipitate an angle-closure glaucoma attack
for screening purposes - such as job applications
the patient is shown a sample that is discernable to normal and abnormal alike

48. A rose bengal does not require the use of...
narrow angles may precipitate an angle-closure glaucoma attack
the cobalt blue filter
pressing on the globe too hard with the probe
desired postoperative refraction

49. When using a penlight to estimate anterior chamber depth - an open angle would appear...
the defect tends to remain stable over time
shortened axial length due to compression
to have little or no shadow
narrow angles may precipitate an angle-closure glaucoma attack

50. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
for screening purposes - such as job applications
refractive surgery
varies according to the type of test administered