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. A patient with which of the following potential diagnoses would be tested with bengal?
a staining agent
central corneal thickness
the cobalt blue filter
severe dry eye

2. In test a patient with the color pseudoisochromatic plates...
refractive error
'test eye'
the patient should be tested with near correction - if worn
23 to 24 mm

3. 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
2.0 or more
10 seconds
A Schirmer's test of 10 mm or more is considered normal.

4. In which of the following would glare testing be most appropriate?
reading disabilities
the cobalt blue filter
5 minutes
posterior subcapsular cataract

5. Which of the following should be color-vision tested one eye at a time?
pressing on the globe too hard with the probe
suspected acquired color defect
Allow the patient to adjust to the light level before reading the letters.
severe dry eye

6. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
blink
having them trace the number/figure
normal tearing

7. Color vision testing is used to detect all of the following except...
white to white corneal diameter
narrow angles may precipitate an angle-closure glaucoma attack
can often be cured if the causative factor is eliminated
differentiate between congenital or acquired color blindness

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?
having them trace the number/figure
0.3 mm
rods
white to white corneal diameter

9. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
23 to 24 mm
for screening purposes - such as job applications
normal tearing

10. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
23 to 24 mm
20
varies according to the type of test
the use of an anesthetic

11. A TBUT of which of the following would indicate tear film dysfunction?
10 seconds
'test eye'
0.3 mm
can often be cured if the causative factor is eliminated

12. Schirmer's test does not require _____ except Test strips
blink
narrow angles may precipitate an angle-closure glaucoma attack
posterior subcapsular cataract
expensive equipment

13. Almost all of the formulas for calculating IOL power...
blink
both eyes equally
patient wearing spectacles
are based on the same general equation

14. Measuring time for the Schirmer's test is...
can often be cured if the causative factor is eliminated
5 minutes
varies according to the type of test
2.0 or more

15. 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)...
A-constant
0.3 mm
Allow the patient to adjust to the light level before reading the letters.
rods

16. When using color plates - a score indicates abnormal color vision...
focus can he moved off-axis to obtain a clear reading
varies according to the type of test
A Schirmer's test of 10 mm or more is considered normal.
with the central cornea

17. Schirmer's test I is used to measure...
are based on the same general equation
pressing on the globe too hard with the probe
having them trace the number/figure
reflex tears

18. Hereditary color defects most often fall into which category?
differentiate between congenital or acquired color blindness
to have little or no shadow
red-green
more males than females

19. A rose bengal does not require the use of...
the cobalt blue filter
tear filter papers
20
ultrasound

20. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
normal tearing
patients who have had corneal refractive surgery
shine the light flatly from the side - in the plane of the iris
the cobalt blue filter

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

22. This is not evaluated using rose Bengal except...
to the left of the scleral and orbital echoes
red-green
normal tearing
corneal endothelial drop-out

23. Rose bengal is...
a staining agent
that the sound beam is directed to the optic disc and the measurement is incorrect
before starting school
dacryocystitis

24. The average central thickness of the human cornea is...
corneal endothelial drop-out
545 pm
is acceptable
23 to 24 mm

25. Glare testing is used to identify...
the appearance of dry spots
decrease in vision due to glare conditions
central corneal thickness
rods

26. When performing a brightness acuity glare test - it is best to do which of the following?
patients who have had corneal refractive surgery
varies according to the type of test
Allow the patient to adjust to the light level before reading the letters.
is acceptable

27. When calculating intraocular lens (IOL) powers - one must enter...
reflex tears
desired postoperative refraction
shine the light flatly from the side - in the plane of the iris
is acceptable

28. Just prior to the beginning of the TBUT test - the patient is instructed to...
narrow beam
blink
to have little or no shadow
central corneal thickness

29. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
23 to 24 mm
are based on the same general equation
can often be cured if the causative factor is eliminated

30. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
ultrasound
patients who have had corneal refractive surgery
varies according to the type of test
a staining agent

31. The Schirmer's test might be indicated in all of the following except...
ultrasound
pressing on the globe too hard with the probe
holding the probe perpendicular to the corneal surface
dacryocystitis

32. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
0.3 mm
rods
red - green - and blue

33. How long should the patient be given to recognize the figure in a color plate?
blink
20
2 to 3 seconds
reading disabilities

34. In evaluating an axial length scan - the retinal echo must be...
shortened axial length due to compression
to the left of the scleral and orbital echoes
having them trace the number/figure
red - green - and blue

35. When performing the TBUT test - the observer is looking for...
holding the probe perpendicular to the corneal surface
red-green
the appearance of dry spots
23 to 24 mm

36. The difference between Schirmer's test I and II is...
5 minutes
the use of an anesthetic
infrared
patient wearing spectacles

37. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
'test eye'
red-green
decrease in vision due to glare conditions

38. Hereditary color vision defects affect...
refractive surgery
more males than females
3.0 D
a tall - central spike with only one peak and smaller spikes on either site

39. The type of pachymetry used to evaluate a glaucoma suspect is...
central corneal thickness
10 seconds
to the left of the scleral and orbital echoes
can often be cured if the causative factor is eliminated

40. Which eye structure is responsible for color vision?
the appearance of dry spots
to the left of the scleral and orbital echoes
rods
the patient is shown a sample that is discernable to normal and abnormal alike

41. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
red-green
a narrow angle and bowed iris cast a shadow on the iris
patient wearing spectacles

42. The photosensitive pigments of the eye are sensitive to...
tear filter papers
red - green - and blue
for screening purposes - such as job applications
to have little or no shadow

43. Pachymetry readings are routinely taken prior to...
infrared
severe dry eye
refractive error
refractive surgery

44. Schirmer's test II is used to measure...
is acceptable
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing
central corneal thickness

45. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
10 seconds
patient wearing spectacles
narrow beam
the defect tends to remain stable over time

46. An A-Sean can he artificially shortened due to...
corneal endothelial drop-out
reading disabilities
pressing on the globe too hard with the probe
more males than females

47. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
rods
IOL power
reflex tears

48. 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
varies according to the type of test administered
focus can he moved off-axis to obtain a clear reading
one-fourth

49. Illumination for the color plates test...
pressing on the globe too hard with the probe
severe dry eye
varies according to the type of test administered
A-constant

50. Acquired color vision defects...
can often be cured if the causative factor is eliminated
tear filter papers
with the central cornea
the use of an anesthetic