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. Laser interferometry uses which type of laser light?
infrared
tear filter papers
the patient should be tested with near correction - if worn
the appearance of dry spots

2. 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)...
normal tearing
to have little or no shadow
the use of an anesthetic
A-constant

3. In test a patient with the color pseudoisochromatic plates...
infrared
2 to 3 seconds
are based on the same general equation
the patient should be tested with near correction - if worn

4. Rose bengal is...
a staining agent
'test eye'
more males than females
to have little or no shadow

5. When should a child have his or her color vision checked?
white to white corneal diameter
refractive error
both eyes equally
before starting school

6. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable
a malingerer may invent a number - thus identifying him- or herself
more males than females

7. Acquired color vision defects...
20
reflex tears
can often be cured if the causative factor is eliminated
central corneal thickness

8. Which eye structure is responsible for color vision?
are based on the same general equation
'test eye'
rods
tear filter papers

9. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
blink
varies according to the type of test
narrow angles may precipitate an angle-closure glaucoma attack
shine the light flatly from the side - in the plane of the iris

10. When using color plates - a score indicates abnormal color vision...
can often be cured if the causative factor is eliminated
holding the probe perpendicular to the corneal surface
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test

11. One of the keys in accurate pachymetry is...
a tall - central spike with only one peak and smaller spikes on either site
dacryocystitis
holding the probe perpendicular to the corneal surface
is acceptable

12. In which of the following would glare testing be most appropriate?
narrow angles may precipitate an angle-closure glaucoma attack
red-green
for screening purposes - such as job applications
posterior subcapsular cataract

13. _______ are not used in evaluating tear break-up time (TBUT)
are based on the same general equation
tear filter papers
the patient is shown a sample that is discernable to normal and abnormal alike
more males than females

14. Schirmer's test I is used to measure...
one-fourth
reflex tears
narrow angles may precipitate an angle-closure glaucoma attack
normal tearing

15. Just prior to the beginning of the TBUT test - the patient is instructed to...
20
blink
more males than females
red - green - and blue

16. The Ishihara color plates are useful...
for screening purposes - such as job applications
patients who have had corneal refractive surgery
the cobalt blue filter
A Schirmer's test of 10 mm or more is considered normal.

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

18. 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?
blink
desired postoperative refraction
0.3 mm
red - green - and blue

19. Schirmer's test II is used to measure...
narrow angles may precipitate an angle-closure glaucoma attack
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing
refractive error

20. In evaluating an axial length scan - the retinal echo must be...
refractive surgery
to the left of the scleral and orbital echoes
to have little or no shadow
refractive error

21. When performing a brightness acuity glare test - it is best to do which of the following?
varies according to the type of test administered
Allow the patient to adjust to the light level before reading the letters.
focus can he moved off-axis to obtain a clear reading
central corneal thickness

22. A rose bengal does not require the use of...
corneal endothelial drop-out
the cobalt blue filter
shine the light flatly from the side - in the plane of the iris
severe dry eye

23. Young children can be tested using the color plates by...
20
23 to 24 mm
having them trace the number/figure
varies according to the type of test administered

24. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
tear filter papers
a tall - central spike with only one peak and smaller spikes on either site
patients who have had corneal refractive surgery

25. Schirmer's test does not require _____ except Test strips
red - green - and blue
expensive equipment
varies according to the type of test
patients who have had corneal refractive surgery

26. Color vision testing is used to detect all of the following except...
suspected acquired color defect
a malingerer may invent a number - thus identifying him- or herself
with the central cornea
differentiate between congenital or acquired color blindness

27. The Schirmer's test might be indicated in all of the following except...
corneal endothelial drop-out
focus can he moved off-axis to obtain a clear reading
dacryocystitis
normal tearing

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

29. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
ultrasound
2 to 3 seconds
expensive equipment

30. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
blink
IOL power
the defect tends to remain stable over time
one-fourth

31. The axial length of an average adult eye is...
23 to 24 mm
focus can he moved off-axis to obtain a clear reading
2.0 or more
both eyes equally

32. Almost all of the formulas for calculating IOL power...
refractive surgery
0.3 mm
IOL power
are based on the same general equation

33. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
a staining agent
ultrasound
A-constant
patient wearing spectacles

34. The IOLMaster evaluates each of the following except...
refractive error
focus can he moved off-axis to obtain a clear reading
narrow beam
corneal endothelial drop-out

35. When performing the TBUT test - the observer is looking for...
more males than females
with the central cornea
the appearance of dry spots
posterior subcapsular cataract

36. The photosensitive pigments of the eye are sensitive to...
reflex tears
2 to 3 seconds
to the left of the scleral and orbital echoes
red - green - and blue

37. The axial length of the eye is important in the calculation of...
red - green - and blue
holding the probe perpendicular to the corneal surface
IOL power
to the left of the scleral and orbital echoes

38. A patient with which of the following potential diagnoses would be tested with bengal?
suspected acquired color defect
infrared
red - green - and blue
severe dry eye

39. Measuring corneal thickness via nonoptical pachymetry involves the use of...
the appearance of dry spots
pressing on the globe too hard with the probe
ultrasound
'test eye'

40. The IOLMaster eliminates which of the following sources of error?
posterior subcapsular cataract
with the central cornea
shortened axial length due to compression
suspected acquired color defect

41. An A-Sean can he artificially shortened due to...
a tall - central spike with only one peak and smaller spikes on either site
pressing on the globe too hard with the probe
expensive equipment
white to white corneal diameter

42. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
expensive equipment
blink
central corneal thickness

43. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
holding the probe perpendicular to the corneal surface
3.0 D
the patient is shown a sample that is discernable to normal and abnormal alike
shine the light flatly from the side - in the plane of the iris

44. This is not evaluated using rose Bengal except...
pressing on the globe too hard with the probe
corneal endothelial drop-out
reading disabilities
holding the probe perpendicular to the corneal surface

45. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
differentiate between congenital or acquired color blindness
545 pm
varies according to the type of test
20

46. When calculating intraocular lens (IOL) powers - one must enter...
20
is acceptable
refractive surgery
desired postoperative refraction

47. 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?
corneal endothelial drop-out
before starting school
one-fourth
varies according to the type of test administered

48. Illumination for the color plates test...
varies according to the type of test administered
the appearance of dry spots
remove the instrument from use
corneal endothelial drop-out

49. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
545 pm
remove the instrument from use
23 to 24 mm

50. Hereditary color defects most often fall into which category?
red-green
a malingerer may invent a number - thus identifying him- or herself
20
reading disabilities