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 difference between Schirmer's test I and II is...
remove the instrument from use
that the sound beam is directed to the optic disc and the measurement is incorrect
posterior subcapsular cataract
the use of an anesthetic

2. Rose bengal is...
the use of an anesthetic
suspected acquired color defect
a staining agent
central corneal thickness

3. Hereditary color vision defects affect...
central corneal thickness
ultrasound
tear filter papers
more males than females

4. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
suspected acquired color defect
'test eye'
for screening purposes - such as job applications

5. When performing a brightness acuity glare test - it is best to do which of the following?
red - green - and blue
Allow the patient to adjust to the light level before reading the letters.
normal tearing
more males than females

6. A patient with which of the following potential diagnoses would be tested with bengal?
the cobalt blue filter
suspected acquired color defect
with the central cornea
severe dry eye

7. The axial length of an average adult eye is...
23 to 24 mm
reading disabilities
a narrow angle and bowed iris cast a shadow on the iris
a malingerer may invent a number - thus identifying him- or herself

8. Schirmer's test does not require _____ except Test strips
expensive equipment
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery
before starting school

9. Pachymetry readings are routinely taken prior to...
holding the probe perpendicular to the corneal surface
refractive surgery
23 to 24 mm
narrow angles may precipitate an angle-closure glaucoma attack

10. The Ishihara color plates are useful...
decrease in vision due to glare conditions
patients who have had corneal refractive surgery
for screening purposes - such as job applications
varies according to the type of test administered

11. Young children can be tested using the color plates by...
the cobalt blue filter
the patient is shown a sample that is discernable to normal and abnormal alike
having them trace the number/figure
severe dry eye

12. Which eye structure is responsible for color vision?
for screening purposes - such as job applications
shine the light flatly from the side - in the plane of the iris
A-constant
rods

13. Hereditary color vision defects usually affect...
20
545 pm
dacryocystitis
both eyes equally

14. The IOLMaster evaluates each of the following except...
red-green
remove the instrument from use
patient wearing spectacles
refractive error

15. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
expensive equipment
20
desired postoperative refraction
shortened axial length due to compression

16. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
with the central cornea
suspected acquired color defect
a narrow angle and bowed iris cast a shadow on the iris

17. One of the keys in accurate pachymetry is...
that the sound beam is directed to the optic disc and the measurement is incorrect
can often be cured if the causative factor is eliminated
20
holding the probe perpendicular to the corneal surface

18. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
reading disabilities
desired postoperative refraction
refractive error

19. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
dacryocystitis
desired postoperative refraction
ultrasound

20. A rose bengal does not require the use of...
suspected acquired color defect
central corneal thickness
varies according to the type of test
the cobalt blue filter

21. When positioning the IOLMaster for the axial length reading...
differentiate between congenital or acquired color blindness
focus can he moved off-axis to obtain a clear reading
patients who have had corneal refractive surgery
reading disabilities

22. A color plate that shows no obvious number to normal and abnormal alike is useful because...
the cobalt blue filter
with the central cornea
refractive surgery
a malingerer may invent a number - thus identifying him- or herself

23. This is not evaluated using rose Bengal except...
corneal endothelial drop-out
remove the instrument from use
3.0 D
a staining agent

24. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
the appearance of dry spots
narrow beam
3.0 D
varies according to the type of test

25. A TBUT of which of the following would indicate tear film dysfunction?
red-green
ultrasound
having them trace the number/figure
10 seconds

26. Just prior to the beginning of the TBUT test - the patient is instructed to...
one-fourth
differentiate between congenital or acquired color blindness
blink
both eyes equally

27. 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...
central corneal thickness
a narrow angle and bowed iris cast a shadow on the iris
having them trace the number/figure
that the sound beam is directed to the optic disc and the measurement is incorrect

28. The IOLMaster eliminates which of the following sources of error?
normal tearing
expensive equipment
5 minutes
shortened axial length due to compression

29. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
a malingerer may invent a number - thus identifying him- or herself
a tall - central spike with only one peak and smaller spikes on either site
to have little or no shadow

30. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
with the central cornea
more males than females
are based on the same general equation

31. The Schirmer's test might be indicated in all of the following except...
refractive surgery
dacryocystitis
the defect tends to remain stable over time
severe dry eye

32. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
2 to 3 seconds
varies according to the type of test
having them trace the number/figure

33. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
shine the light flatly from the side - in the plane of the iris
reading disabilities
patients who have had corneal refractive surgery
5 minutes

34. Glare testing is used to identify...
having them trace the number/figure
refractive error
A-constant
decrease in vision due to glare conditions

35. Measuring time for the Schirmer's test is...
rods
5 minutes
patients who have had corneal refractive surgery
refractive surgery

36. 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?
for screening purposes - such as job applications
expensive equipment
decrease in vision due to glare conditions
0.3 mm

37. Before proceeding with the actual color plate test...
0.3 mm
with the central cornea
the patient is shown a sample that is discernable to normal and abnormal alike
23 to 24 mm

38. Almost all of the formulas for calculating IOL power...
are based on the same general equation
blink
10 seconds
expensive equipment

39. Schirmer's test I is used to measure...
before starting school
holding the probe perpendicular to the corneal surface
reflex tears
red-green

40. Estimating the anterior chamber depth with a penlight works because...
expensive equipment
a narrow angle and bowed iris cast a shadow on the iris
narrow angles may precipitate an angle-closure glaucoma attack
0.3 mm

41. Color vision defects in children are frequently detected among those with...
red - green - and blue
Allow the patient to adjust to the light level before reading the letters.
reading disabilities
suspected acquired color defect

42. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
reading disabilities
shine the light flatly from the side - in the plane of the iris
ultrasound
the patient should be tested with near correction - if worn

43. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
the patient should be tested with near correction - if worn
'test eye'
3.0 D

44. Color vision testing is used to detect all of the following except...
to the left of the scleral and orbital echoes
remove the instrument from use
differentiate between congenital or acquired color blindness
A-constant

45. 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?
one-fourth
0.3 mm
IOL power
suspected acquired color defect

46. The axial length of the eye is important in the calculation of...
more males than females
10 seconds
blink
IOL power

47. The photosensitive pigments of the eye are sensitive to...
desired postoperative refraction
the cobalt blue filter
ultrasound
red - green - and blue

48. The type of pachymetry used to evaluate a glaucoma suspect is...
10 seconds
Allow the patient to adjust to the light level before reading the letters.
rods
central corneal thickness

49. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
more males than females
shortened axial length due to compression
the cobalt blue filter

50. An A-Sean can he artificially shortened due to...
tear filter papers
pressing on the globe too hard with the probe
the defect tends to remain stable over time
reading disabilities