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. Hereditary color vision defects usually affect...
the patient should be tested with near correction - if worn
the appearance of dry spots
to have little or no shadow
both eyes equally

2. Laser interferometry uses which type of laser light?
pressing on the globe too hard with the probe
infrared
focus can he moved off-axis to obtain a clear reading
dacryocystitis

3. The axial length of the eye is important in the calculation of...
are based on the same general equation
20
IOL power
23 to 24 mm

4. Measuring time for the Schirmer's test is...
'test eye'
5 minutes
corneal endothelial drop-out
the patient should be tested with near correction - if worn

5. When performing the TBUT test - the observer is looking for...
are based on the same general equation
IOL power
is acceptable
the appearance of dry spots

6. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
10 seconds
2.0 or more
expensive equipment
patient wearing spectacles

7. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
narrow angles may precipitate an angle-closure glaucoma attack
rods
a staining agent
shine the light flatly from the side - in the plane of the iris

8. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
pressing on the globe too hard with the probe
20
Allow the patient to adjust to the light level before reading the letters.
dacryocystitis

9. Color vision testing is used to detect all of the following except...
that the sound beam is directed to the optic disc and the measurement is incorrect
red - green - and blue
normal tearing
differentiate between congenital or acquired color blindness

10. In evaluating an axial length scan - the retinal echo must be...
rods
to the left of the scleral and orbital echoes
blink
patients who have had corneal refractive surgery

11. In which of the following would glare testing be most appropriate?
is acceptable
reflex tears
with the central cornea
posterior subcapsular cataract

12. Color vision defects in children are frequently detected among those with...
reading disabilities
refractive error
varies according to the type of test
holding the probe perpendicular to the corneal surface

13. 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)...
is acceptable
A-constant
decrease in vision due to glare conditions
with the central cornea

14. Almost all of the formulas for calculating IOL power...
patient wearing spectacles
before starting school
are based on the same general equation
a staining agent

15. The ideal IOLMaster axial length graph is...
central corneal thickness
white to white corneal diameter
posterior subcapsular cataract
a tall - central spike with only one peak and smaller spikes on either site

16. Rose bengal is...
with the central cornea
posterior subcapsular cataract
red-green
a staining agent

17. Which eye structure is responsible for color vision?
shine the light flatly from the side - in the plane of the iris
remove the instrument from use
rods
pressing on the globe too hard with the probe

18. Illumination for the color plates test...
for screening purposes - such as job applications
'test eye'
expensive equipment
varies according to the type of test administered

19. Young children can be tested using the color plates by...
IOL power
more males than females
10 seconds
having them trace the number/figure

20. When calculating IOL power - each of the following are necessary except...
having them trace the number/figure
white to white corneal diameter
Allow the patient to adjust to the light level before reading the letters.
tear filter papers

21. Estimating the anterior chamber depth with a penlight works because...
2 to 3 seconds
shine the light flatly from the side - in the plane of the iris
a narrow angle and bowed iris cast a shadow on the iris
5 minutes

22. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
shortened axial length due to compression
remove the instrument from use
is acceptable
dacryocystitis

23. _______ are not used in evaluating tear break-up time (TBUT)
3.0 D
tear filter papers
refractive surgery
shine the light flatly from the side - in the plane of the iris

24. When using color plates - a score indicates abnormal color vision...
the use of an anesthetic
varies according to the type of test
the cobalt blue filter
patient wearing spectacles

25. 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
decrease in vision due to glare conditions
pressing on the globe too hard with the probe
reflex tears

26. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
a malingerer may invent a number - thus identifying him- or herself
that the sound beam is directed to the optic disc and the measurement is incorrect
posterior subcapsular cataract

27. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
tear filter papers
patients who have had corneal refractive surgery
patient wearing spectacles
Allow the patient to adjust to the light level before reading the letters.

28. When should a child have his or her color vision checked?
central corneal thickness
before starting school
ultrasound
patient wearing spectacles

29. Pachymetry readings are routinely taken prior to...
545 pm
a narrow angle and bowed iris cast a shadow on the iris
to the left of the scleral and orbital echoes
refractive surgery

30. The difference between Schirmer's test I and II is...
the use of an anesthetic
5 minutes
to have little or no shadow
expensive equipment

31. A rose bengal does not require the use of...
pressing on the globe too hard with the probe
the cobalt blue filter
narrow beam
2.0 or more

32. If a biometry instrument fails to calibrate properly - one should...
both eyes equally
remove the instrument from use
the patient should be tested with near correction - if worn
posterior subcapsular cataract

33. 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
reflex tears
focus can he moved off-axis to obtain a clear reading
are based on the same general equation

34. This is not evaluated using rose Bengal except...
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery
corneal endothelial drop-out
with the central cornea

35. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
is acceptable
before starting school
infrared

36. A TBUT of which of the following would indicate tear film dysfunction?
tear filter papers
10 seconds
ultrasound
blink

37. In test a patient with the color pseudoisochromatic plates...
varies according to the type of test administered
corneal endothelial drop-out
the patient should be tested with near correction - if worn
0.3 mm

38. Measuring corneal thickness via nonoptical pachymetry involves the use of...
23 to 24 mm
ultrasound
is acceptable
having them trace the number/figure

39. When performing pachymetry prior to refractive surgery - it is generally best to begin...
23 to 24 mm
with the central cornea
0.3 mm
differentiate between congenital or acquired color blindness

40. It is important to estimate the anterior chamber depth prior to dilation because...
the cobalt blue filter
are based on the same general equation
narrow angles may precipitate an angle-closure glaucoma attack
posterior subcapsular cataract

41. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
before starting school
posterior subcapsular cataract
having them trace the number/figure

42. 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...
refractive error
one-fourth
that the sound beam is directed to the optic disc and the measurement is incorrect
white to white corneal diameter

43. Which of the following should be color-vision tested one eye at a time?
23 to 24 mm
expensive equipment
suspected acquired color defect
Allow the patient to adjust to the light level before reading the letters.

44. The IOLMaster eliminates which of the following sources of error?
IOL power
patients who have had corneal refractive surgery
shortened axial length due to compression
tear filter papers

45. Schirmer's test does not require _____ except Test strips
normal tearing
corneal endothelial drop-out
a narrow angle and bowed iris cast a shadow on the iris
expensive equipment

46. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
dacryocystitis
narrow beam
varies according to the type of test administered
having them trace the number/figure

47. A patient with which of the following potential diagnoses would be tested with bengal?
holding the probe perpendicular to the corneal surface
20
severe dry eye
the appearance of dry spots

48. Before proceeding with the actual color plate test...
the appearance of dry spots
the patient is shown a sample that is discernable to normal and abnormal alike
blink
tear filter papers

49. Glare testing is used to identify...
for screening purposes - such as job applications
decrease in vision due to glare conditions
23 to 24 mm
5 minutes

50. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
normal tearing
narrow beam
refractive error