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. 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...
that the sound beam is directed to the optic disc and the measurement is incorrect
posterior subcapsular cataract
IOL power
reflex tears

2. A patient with which of the following potential diagnoses would be tested with bengal?
refractive error
the appearance of dry spots
severe dry eye
10 seconds

3. Pachymetry readings are routinely taken prior to...
refractive surgery
shine the light flatly from the side - in the plane of the iris
rods
red - green - and blue

4. Estimating the anterior chamber depth with a penlight works because...
IOL power
shortened axial length due to compression
a narrow angle and bowed iris cast a shadow on the iris
dacryocystitis

5. _______ are not used in evaluating tear break-up time (TBUT)
the defect tends to remain stable over time
suspected acquired color defect
the patient should be tested with near correction - if worn
tear filter papers

6. 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
reading disabilities
pressing on the globe too hard with the probe
that the sound beam is directed to the optic disc and the measurement is incorrect

7. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
desired postoperative refraction
pressing on the globe too hard with the probe
0.3 mm

8. The difference between Schirmer's test I and II is...
5 minutes
corneal endothelial drop-out
the use of an anesthetic
narrow angles may precipitate an angle-closure glaucoma attack

9. When performing a brightness acuity glare test - it is best to do which of the following?
white to white corneal diameter
'test eye'
2.0 or more
Allow the patient to adjust to the light level before reading the letters.

10. 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
refractive error
severe dry eye
having them trace the number/figure

11. Measuring corneal thickness via nonoptical pachymetry involves the use of...
rods
refractive surgery
5 minutes
ultrasound

12. Hereditary color vision defects usually affect...
red - green - and blue
that the sound beam is directed to the optic disc and the measurement is incorrect
both eyes equally
are based on the same general equation

13. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
for screening purposes - such as job applications
23 to 24 mm
patient wearing spectacles
the patient is shown a sample that is discernable to normal and abnormal alike

14. Illumination for the color plates test...
more males than females
the appearance of dry spots
varies according to the type of test administered
narrow angles may precipitate an angle-closure glaucoma attack

15. An A-Sean can he artificially shortened due to...
the appearance of dry spots
2.0 or more
pressing on the globe too hard with the probe
dacryocystitis

16. 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?
focus can he moved off-axis to obtain a clear reading
pressing on the globe too hard with the probe
one-fourth
a staining agent

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. Rose bengal is...
central corneal thickness
the appearance of dry spots
blink
a staining agent

19. The axial length of an average adult eye is...
2.0 or more
23 to 24 mm
having them trace the number/figure
patients who have had corneal refractive surgery

20. The type of pachymetry used to evaluate a glaucoma suspect is...
20
to the left of the scleral and orbital echoes
central corneal thickness
white to white corneal diameter

21. When using a penlight to estimate anterior chamber depth - an open angle would appear...
shortened axial length due to compression
the cobalt blue filter
to have little or no shadow
545 pm

22. With the 1OLMaster - the ideal signal-to-noise ratio is...
before starting school
a staining agent
A-constant
2.0 or more

23. Hereditary color vision defects affect...
posterior subcapsular cataract
the patient should be tested with near correction - if worn
more males than females
A Schirmer's test of 10 mm or more is considered normal.

24. When should a child have his or her color vision checked?
a staining agent
blink
before starting school
23 to 24 mm

25. Schirmer's test does not require _____ except Test strips
severe dry eye
expensive equipment
20
is acceptable

26. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
varies according to the type of test
red-green
the patient is shown a sample that is discernable to normal and abnormal alike

27. A TBUT of which of the following would indicate tear film dysfunction?
a narrow angle and bowed iris cast a shadow on the iris
for screening purposes - such as job applications
5 minutes
10 seconds

28. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
infrared
for screening purposes - such as job applications
varies according to the type of test administered

29. Color vision testing is used to detect all of the following except...
expensive equipment
one-fourth
differentiate between congenital or acquired color blindness
A-constant

30. In evaluating an axial length scan - the retinal echo must be...
a tall - central spike with only one peak and smaller spikes on either site
to the left of the scleral and orbital echoes
central corneal thickness
reading disabilities

31. If a biometry instrument fails to calibrate properly - one should...
a malingerer may invent a number - thus identifying him- or herself
refractive surgery
remove the instrument from use
patient wearing spectacles

32. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
differentiate between congenital or acquired color blindness
10 seconds
shine the light flatly from the side - in the plane of the iris
varies according to the type of test

33. The photosensitive pigments of the eye are sensitive to...
red - green - and blue
refractive surgery
a staining agent
suspected acquired color defect

34. A rose bengal does not require the use of...
corneal endothelial drop-out
desired postoperative refraction
10 seconds
the cobalt blue filter

35. Laser interferometry uses which type of laser light?
the use of an anesthetic
expensive equipment
tear filter papers
infrared

36. When positioning the IOLMaster for the axial length reading...
3.0 D
reflex tears
ultrasound
focus can he moved off-axis to obtain a clear reading

37. Hereditary color defects most often fall into which category?
545 pm
a tall - central spike with only one peak and smaller spikes on either site
red-green
is acceptable

38. It is important to estimate the anterior chamber depth prior to dilation because...
Allow the patient to adjust to the light level before reading the letters.
narrow angles may precipitate an angle-closure glaucoma attack
pressing on the globe too hard with the probe
having them trace the number/figure

39. This is not evaluated using rose Bengal except...
varies according to the type of test administered
corneal endothelial drop-out
the use of an anesthetic
varies according to the type of test

40. Glare testing is used to identify...
decrease in vision due to glare conditions
the use of an anesthetic
the cobalt blue filter
a tall - central spike with only one peak and smaller spikes on either site

41. Before proceeding with the actual color plate test...
is acceptable
the patient is shown a sample that is discernable to normal and abnormal alike
red-green
a staining agent

42. The IOLMaster evaluates each of the following except...
for screening purposes - such as job applications
before starting school
refractive error
decrease in vision due to glare conditions

43. The IOLMaster eliminates which of the following sources of error?
to the left of the scleral and orbital echoes
10 seconds
shortened axial length due to compression
2 to 3 seconds

44. The average central thickness of the human cornea is...
ultrasound
545 pm
a narrow angle and bowed iris cast a shadow on the iris
to the left of the scleral and orbital echoes

45. Schirmer's test II is used to measure...
3.0 D
normal tearing
10 seconds
tear filter papers

46. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
0.3 mm
a malingerer may invent a number - thus identifying him- or herself
having them trace the number/figure
narrow beam

47. Which eye structure is responsible for color vision?
the patient is shown a sample that is discernable to normal and abnormal alike
tear filter papers
IOL power
rods

48. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
both eyes equally
tear filter papers
rods

49. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time
that the sound beam is directed to the optic disc and the measurement is incorrect
a tall - central spike with only one peak and smaller spikes on either site

50. The Ishihara color plates are useful...
for screening purposes - such as job applications
desired postoperative refraction
normal tearing
ultrasound