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. When using color plates - a score indicates abnormal color vision...
the patient is shown a sample that is discernable to normal and abnormal alike
2 to 3 seconds
that the sound beam is directed to the optic disc and the measurement is incorrect
varies according to the type of test

2. 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
the cobalt blue filter
focus can he moved off-axis to obtain a clear reading
10 seconds

3. Schirmer's test I is used to measure...
reading disabilities
reflex tears
A Schirmer's test of 10 mm or more is considered normal.
white to white corneal diameter

4. In test a patient with the color pseudoisochromatic plates...
posterior subcapsular cataract
that the sound beam is directed to the optic disc and the measurement is incorrect
IOL power
the patient should be tested with near correction - if worn

5. The Schirmer's test might be indicated in all of the following except...
dacryocystitis
a malingerer may invent a number - thus identifying him- or herself
severe dry eye
infrared

6. The axial length of an average adult eye is...
the cobalt blue filter
focus can he moved off-axis to obtain a clear reading
23 to 24 mm
decrease in vision due to glare conditions

7. The type of pachymetry used to evaluate a glaucoma suspect is...
desired postoperative refraction
central corneal thickness
a narrow angle and bowed iris cast a shadow on the iris
10 seconds

8. When should a child have his or her color vision checked?
before starting school
2.0 or more
decrease in vision due to glare conditions
desired postoperative refraction

9. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
23 to 24 mm
the defect tends to remain stable over time
refractive error

10. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
holding the probe perpendicular to the corneal surface
20
desired postoperative refraction

11. Young children can be tested using the color plates by...
having them trace the number/figure
severe dry eye
narrow beam
to have little or no shadow

12. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
rods
2 to 3 seconds
differentiate between congenital or acquired color blindness
patient wearing spectacles

13. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
more males than females
shine the light flatly from the side - in the plane of the iris
blink

14. A rose bengal does not require the use of...
red-green
a narrow angle and bowed iris cast a shadow on the iris
expensive equipment
the cobalt blue filter

15. 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...
varies according to the type of test
tear filter papers
desired postoperative refraction
that the sound beam is directed to the optic disc and the measurement is incorrect

16. Hereditary color vision defects usually affect...
white to white corneal diameter
the cobalt blue filter
corneal endothelial drop-out
both eyes equally

17. If a biometry instrument fails to calibrate properly - one should...
a narrow angle and bowed iris cast a shadow on the iris
remove the instrument from use
pressing on the globe too hard with the probe
dacryocystitis

18. Measuring time for the Schirmer's test is...
Allow the patient to adjust to the light level before reading the letters.
5 minutes
tear filter papers
A-constant

19. Schirmer's test II is used to measure...
to have little or no shadow
to the left of the scleral and orbital echoes
both eyes equally
normal tearing

20. 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?
refractive error
one-fourth
decrease in vision due to glare conditions
the appearance of dry spots

21. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
reading disabilities
differentiate between congenital or acquired color blindness
expensive equipment

22. Glare testing is used to identify...
corneal endothelial drop-out
'test eye'
infrared
decrease in vision due to glare conditions

23. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
decrease in vision due to glare conditions
central corneal thickness
20

24. Hereditary color vision defects affect...
patient wearing spectacles
more males than females
the patient should be tested with near correction - if worn
varies according to the type of test

25. Pachymetry readings are routinely taken prior to...
central corneal thickness
refractive surgery
posterior subcapsular cataract
are based on the same general equation

26. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
varies according to the type of test
the defect tends to remain stable over time
a malingerer may invent a number - thus identifying him- or herself
both eyes equally

27. An A-Sean can he artificially shortened due to...
severe dry eye
pressing on the globe too hard with the probe
0.3 mm
'test eye'

28. One of the keys in accurate pachymetry is...
holding the probe perpendicular to the corneal surface
5 minutes
the cobalt blue filter
tear filter papers

29. Illumination for the color plates test...
23 to 24 mm
suspected acquired color defect
varies according to the type of test administered
severe dry eye

30. 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.
tear filter papers
3.0 D
corneal endothelial drop-out

31. The axial length of the eye is important in the calculation of...
a tall - central spike with only one peak and smaller spikes on either site
545 pm
a narrow angle and bowed iris cast a shadow on the iris
IOL power

32. The IOLMaster eliminates which of the following sources of error?
normal tearing
A-constant
for screening purposes - such as job applications
shortened axial length due to compression

33. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
A Schirmer's test of 10 mm or more is considered normal.
shine the light flatly from the side - in the plane of the iris
narrow beam
a malingerer may invent a number - thus identifying him- or herself

34. Hereditary color defects most often fall into which category?
both eyes equally
that the sound beam is directed to the optic disc and the measurement is incorrect
red-green
are based on the same general equation

35. 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
a malingerer may invent a number - thus identifying him- or herself
rods
can often be cured if the causative factor is eliminated

36. Laser interferometry uses which type of laser light?
remove the instrument from use
the patient should be tested with near correction - if worn
infrared
normal tearing

37. 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
5 minutes
normal tearing
reading disabilities

38. Schirmer's test does not require _____ except Test strips
is acceptable
ultrasound
narrow angles may precipitate an angle-closure glaucoma attack
expensive equipment

39. Rose bengal is...
0.3 mm
more males than females
blink
a staining agent

40. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the patient should be tested with near correction - if worn
patients who have had corneal refractive surgery
'test eye'
5 minutes

41. The IOLMaster evaluates each of the following except...
narrow angles may precipitate an angle-closure glaucoma attack
is acceptable
pressing on the globe too hard with the probe
refractive error

42. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
rods
20
shortened axial length due to compression
suspected acquired color defect

43. Which eye structure is responsible for color vision?
infrared
central corneal thickness
rods
is acceptable

44. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
expensive equipment
'test eye'
varies according to the type of test

45. When performing pachymetry prior to refractive surgery - it is generally best to begin...
ultrasound
focus can he moved off-axis to obtain a clear reading
'test eye'
with the central cornea

46. This is not evaluated using rose Bengal except...
decrease in vision due to glare conditions
that the sound beam is directed to the optic disc and the measurement is incorrect
A Schirmer's test of 10 mm or more is considered normal.
corneal endothelial drop-out

47. When performing the TBUT test - the observer is looking for...
a narrow angle and bowed iris cast a shadow on the iris
severe dry eye
the appearance of dry spots
varies according to the type of test

48. A patient with which of the following potential diagnoses would be tested with bengal?
a staining agent
severe dry eye
dacryocystitis
are based on the same general equation

49. The difference between Schirmer's test I and II is...
A-constant
varies according to the type of test
the use of an anesthetic
is acceptable

50. How long should the patient be given to recognize the figure in a color plate?
2.0 or more
2 to 3 seconds
Allow the patient to adjust to the light level before reading the letters.
3.0 D