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 axial length of the eye is important in the calculation of...
IOL power
a malingerer may invent a number - thus identifying him- or herself
a staining agent
shortened axial length due to compression

2. Schirmer's test II is used to measure...
narrow beam
545 pm
normal tearing
white to white corneal diameter

3. Color vision defects in children are frequently detected among those with...
having them trace the number/figure
more males than females
a staining agent
reading disabilities

4. An A-Sean can he artificially shortened due to...
reflex tears
narrow angles may precipitate an angle-closure glaucoma attack
expensive equipment
pressing on the globe too hard with the probe

5. When calculating IOL power - each of the following are necessary except...
3.0 D
white to white corneal diameter
tear filter papers
varies according to the type of test administered

6. When using color plates - a score indicates abnormal color vision...
rods
varies according to the type of test
normal tearing
are based on the same general equation

7. 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.
red - green - and blue
posterior subcapsular cataract
to the left of the scleral and orbital echoes

8. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
the patient should be tested with near correction - if worn
one-fourth
white to white corneal diameter

9. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
pressing on the globe too hard with the probe
having them trace the number/figure
the patient should be tested with near correction - if worn

10. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
to the left of the scleral and orbital echoes
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression
patient wearing spectacles

11. Schirmer's test does not require _____ except Test strips
a tall - central spike with only one peak and smaller spikes on either site
focus can he moved off-axis to obtain a clear reading
2.0 or more
expensive equipment

12. Which eye structure is responsible for color vision?
2.0 or more
desired postoperative refraction
rods
holding the probe perpendicular to the corneal surface

13. The Ishihara color plates are useful...
red - green - and blue
for screening purposes - such as job applications
shortened axial length due to compression
normal tearing

14. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
narrow beam
IOL power
the patient should be tested with near correction - if worn

15. The average central thickness of the human cornea is...
545 pm
varies according to the type of test administered
is acceptable
remove the instrument from use

16. In evaluating an axial length scan - the retinal echo must be...
varies according to the type of test administered
3.0 D
23 to 24 mm
to the left of the scleral and orbital echoes

17. A patient with which of the following potential diagnoses would be tested with bengal?
3.0 D
having them trace the number/figure
holding the probe perpendicular to the corneal surface
severe dry eye

18. The IOLMaster must be calibrated daily using a...

19. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
rods
a malingerer may invent a number - thus identifying him- or herself
is acceptable

20. In test a patient with the color pseudoisochromatic plates...
patients who have had corneal refractive surgery
the patient should be tested with near correction - if worn
narrow angles may precipitate an angle-closure glaucoma attack
more males than females

21. Illumination for the color plates test...
infrared
varies according to the type of test administered
desired postoperative refraction
23 to 24 mm

22. Estimating the anterior chamber depth with a penlight works because...
the cobalt blue filter
both eyes equally
posterior subcapsular cataract
a narrow angle and bowed iris cast a shadow on the iris

23. The IOLMaster evaluates each of the following except...
patient wearing spectacles
that the sound beam is directed to the optic disc and the measurement is incorrect
refractive error
expensive equipment

24. Glare testing is used to identify...
decrease in vision due to glare conditions
ultrasound
white to white corneal diameter
reflex tears

25. A TBUT of which of the following would indicate tear film dysfunction?
a tall - central spike with only one peak and smaller spikes on either site
23 to 24 mm
reflex tears
10 seconds

26. One of the keys in accurate pachymetry is...
3.0 D
having them trace the number/figure
can often be cured if the causative factor is eliminated
holding the probe perpendicular to the corneal surface

27. Color vision testing is used to detect all of the following except...
rods
pressing on the globe too hard with the probe
white to white corneal diameter
differentiate between congenital or acquired color blindness

28. Hereditary color vision defects usually affect...
before starting school
both eyes equally
is acceptable
2 to 3 seconds

29. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
suspected acquired color defect
'test eye'
20
blink

30. Almost all of the formulas for calculating IOL power...
blink
posterior subcapsular cataract
Allow the patient to adjust to the light level before reading the letters.
are based on the same general equation

31. Pachymetry readings are routinely taken prior to...
white to white corneal diameter
pressing on the globe too hard with the probe
rods
refractive surgery

32. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
refractive surgery
blink
white to white corneal diameter
patients who have had corneal refractive surgery

33. The difference between Schirmer's test I and II is...
for screening purposes - such as job applications
before starting school
the use of an anesthetic
IOL power

34. 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?
23 to 24 mm
both eyes equally
one-fourth
3.0 D

35. Rose bengal is...
differentiate between congenital or acquired color blindness
3.0 D
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

36. Schirmer's test I is used to measure...
reflex tears
a malingerer may invent a number - thus identifying him- or herself
shine the light flatly from the side - in the plane of the iris
is acceptable

37. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
the cobalt blue filter
the defect tends to remain stable over time
patients who have had corneal refractive surgery
red - green - and blue

38. When should a child have his or her color vision checked?
normal tearing
before starting school
central corneal thickness
varies according to the type of test administered

39. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
desired postoperative refraction
more males than females
infrared

40. When performing the TBUT test - the observer is looking for...
the patient is shown a sample that is discernable to normal and abnormal alike
the appearance of dry spots
before starting school
differentiate between congenital or acquired color blindness

41. Hereditary color vision defects affect...
more males than females
is acceptable
the defect tends to remain stable over time
narrow beam

42. 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
10 seconds
varies according to the type of test administered
central corneal thickness

43. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
are based on the same general equation
before starting school
severe dry eye

44. Which of the following should be color-vision tested one eye at a time?
differentiate between congenital or acquired color blindness
varies according to the type of test
having them trace the number/figure
suspected acquired color defect

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

46. The axial length of an average adult eye is...
23 to 24 mm
shortened axial length due to compression
refractive error
patients who have had corneal refractive surgery

47. Measuring time for the Schirmer's test is...
differentiate between congenital or acquired color blindness
5 minutes
tear filter papers
reflex tears

48. The Schirmer's test might be indicated in all of the following except...
3.0 D
dacryocystitis
that the sound beam is directed to the optic disc and the measurement is incorrect
0.3 mm

49. With the 1OLMaster - the ideal signal-to-noise ratio is...
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris
tear filter papers
2.0 or more

50. Acquired color vision defects...
the patient should be tested with near correction - if worn
can often be cured if the causative factor is eliminated
refractive error
before starting school