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. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
the defect tends to remain stable over time
narrow angles may precipitate an angle-closure glaucoma attack
corneal endothelial drop-out
20

2. Measuring corneal thickness via nonoptical pachymetry involves the use of...
one-fourth
narrow angles may precipitate an angle-closure glaucoma attack
ultrasound
a narrow angle and bowed iris cast a shadow on the iris

3. In which of the following would glare testing be most appropriate?
can often be cured if the causative factor is eliminated
infrared
posterior subcapsular cataract
0.3 mm

4. Laser interferometry uses which type of laser light?
central corneal thickness
infrared
can often be cured if the causative factor is eliminated
'test eye'

5. The Schirmer's test might be indicated in all of the following except...
for screening purposes - such as job applications
the use of an anesthetic
dacryocystitis
are based on the same general equation

6. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
varies according to the type of test administered
normal tearing
for screening purposes - such as job applications

7. Which eye structure is responsible for color vision?
rods
a malingerer may invent a number - thus identifying him- or herself
posterior subcapsular cataract
holding the probe perpendicular to the corneal surface

8. Schirmer's test does not require _____ except Test strips
expensive equipment
with the central cornea
ultrasound
can often be cured if the causative factor is eliminated

9. It is important to estimate the anterior chamber depth prior to dilation because...
rods
narrow angles may precipitate an angle-closure glaucoma attack
with the central cornea
545 pm

10. Glare testing is used to identify...
decrease in vision due to glare conditions
having them trace the number/figure
central corneal thickness
before starting school

11. 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?
0.3 mm
blink
shortened axial length due to compression
having them trace the number/figure

12. The axial length of an average adult eye is...
red-green
23 to 24 mm
20
2.0 or more

13. The ideal IOLMaster axial length graph is...
focus can he moved off-axis to obtain a clear reading
545 pm
a staining agent
a tall - central spike with only one peak and smaller spikes on either site

14. Illumination for the color plates test...
one-fourth
corneal endothelial drop-out
varies according to the type of test administered
the defect tends to remain stable over time

15. When using a penlight to estimate anterior chamber depth - an open angle would appear...
a malingerer may invent a number - thus identifying him- or herself
reflex tears
to have little or no shadow
decrease in vision due to glare conditions

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

17. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
the cobalt blue filter
severe dry eye
a malingerer may invent a number - thus identifying him- or herself
shine the light flatly from the side - in the plane of the iris

18. When performing the TBUT test - the observer is looking for...
the appearance of dry spots
posterior subcapsular cataract
shortened axial length due to compression
ultrasound

19. Measuring time for the Schirmer's test is...
normal tearing
5 minutes
central corneal thickness
the use of an anesthetic

20. The Ishihara color plates are useful...
white to white corneal diameter
a staining agent
decrease in vision due to glare conditions
for screening purposes - such as job applications

21. Estimating the anterior chamber depth with a penlight works because...
posterior subcapsular cataract
A Schirmer's test of 10 mm or more is considered normal.
is acceptable
a narrow angle and bowed iris cast a shadow on the iris

22. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
the use of an anesthetic
reading disabilities
one-fourth

23. Acquired color vision defects...
ultrasound
normal tearing
decrease in vision due to glare conditions
can often be cured if the causative factor is eliminated

24. The IOLMaster evaluates each of the following except...
shine the light flatly from the side - in the plane of the iris
ultrasound
refractive error
white to white corneal diameter

25. In evaluating an axial length scan - the retinal echo must be...
white to white corneal diameter
to the left of the scleral and orbital echoes
more males than females
10 seconds

26. Hereditary color defects most often fall into which category?
tear filter papers
focus can he moved off-axis to obtain a clear reading
Allow the patient to adjust to the light level before reading the letters.
red-green

27. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
reflex tears
are based on the same general equation
a narrow angle and bowed iris cast a shadow on the iris

28. Color vision testing is used to detect all of the following except...
one-fourth
differentiate between congenital or acquired color blindness
a malingerer may invent a number - thus identifying him- or herself
severe dry eye

29. In test a patient with the color pseudoisochromatic plates...
the patient should be tested with near correction - if worn
to have little or no shadow
normal tearing
more males than females

30. Pachymetry readings are routinely taken prior to...
the use of an anesthetic
blink
shortened axial length due to compression
refractive surgery

31. Almost all of the formulas for calculating IOL power...
0.3 mm
narrow angles may precipitate an angle-closure glaucoma attack
20
are based on the same general equation

32. With the 1OLMaster - the ideal signal-to-noise ratio is...
2.0 or more
the appearance of dry spots
differentiate between congenital or acquired color blindness
can often be cured if the causative factor is eliminated

33. An A-Sean can he artificially shortened due to...
holding the probe perpendicular to the corneal surface
pressing on the globe too hard with the probe
desired postoperative refraction
having them trace the number/figure

34. A TBUT of which of the following would indicate tear film dysfunction?
both eyes equally
one-fourth
10 seconds
pressing on the globe too hard with the probe

35. 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...
narrow beam
dacryocystitis
20
that the sound beam is directed to the optic disc and the measurement is incorrect

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

37. If a biometry instrument fails to calibrate properly - one should...
5 minutes
a narrow angle and bowed iris cast a shadow on the iris
remove the instrument from use
reading disabilities

38. The difference between Schirmer's test I and II is...
ultrasound
the use of an anesthetic
the defect tends to remain stable over time
expensive equipment

39. 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?
the cobalt blue filter
one-fourth
rods
red - green - and blue

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

41. When using color plates - a score indicates abnormal color vision...
dacryocystitis
severe dry eye
varies according to the type of test
2.0 or more

42. 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
'test eye'
to have little or no shadow
varies according to the type of test administered

43. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
20
red-green
A Schirmer's test of 10 mm or more is considered normal.

44. Just prior to the beginning of the TBUT test - the patient is instructed to...
remove the instrument from use
shortened axial length due to compression
blink
posterior subcapsular cataract

45. Before proceeding with the actual color plate test...
A-constant
the patient is shown a sample that is discernable to normal and abnormal alike
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery

46. _______ are not used in evaluating tear break-up time (TBUT)
more males than females
refractive error
posterior subcapsular cataract
tear filter papers

47. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
one-fourth
narrow beam
are based on the same general equation

48. Which of the following should be color-vision tested one eye at a time?
red - green - and blue
expensive equipment
suspected acquired color defect
narrow beam

49. Color vision defects in children are frequently detected among those with...
varies according to the type of test
infrared
A-constant
reading disabilities

50. Hereditary color vision defects usually affect...
a tall - central spike with only one peak and smaller spikes on either site
both eyes equally
before starting school
IOL power