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 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?
posterior subcapsular cataract
decrease in vision due to glare conditions
red-green
one-fourth

2. Illumination for the color plates test...
varies according to the type of test administered
decrease in vision due to glare conditions
a narrow angle and bowed iris cast a shadow on the iris
refractive surgery

3. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
pressing on the globe too hard with the probe
3.0 D
decrease in vision due to glare conditions
the patient should be tested with near correction - if worn

4. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
545 pm
patient wearing spectacles
23 to 24 mm

5. Color vision defects in children are frequently detected among those with...
patients who have had corneal refractive surgery
decrease in vision due to glare conditions
reading disabilities
dacryocystitis

6. The Ishihara color plates are useful...
the patient is shown a sample that is discernable to normal and abnormal alike
for screening purposes - such as job applications
differentiate between congenital or acquired color blindness
the defect tends to remain stable over time

7. An A-Sean can he artificially shortened due to...
pressing on the globe too hard with the probe
to have little or no shadow
both eyes equally
Allow the patient to adjust to the light level before reading the letters.

8. A patient with which of the following potential diagnoses would be tested with bengal?
severe dry eye
is acceptable
Allow the patient to adjust to the light level before reading the letters.
rods

9. When using a penlight to estimate anterior chamber depth - an open angle would appear...
focus can he moved off-axis to obtain a clear reading
to have little or no shadow
is acceptable
3.0 D

10. Schirmer's test I is used to measure...
reflex tears
refractive error
545 pm
narrow beam

11. The IOLMaster eliminates which of the following sources of error?
the patient should be tested with near correction - if worn
can often be cured if the causative factor is eliminated
rods
shortened axial length due to compression

12. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
dacryocystitis
more males than females
a narrow angle and bowed iris cast a shadow on the iris
is acceptable

13. Color vision testing is used to detect all of the following except...
suspected acquired color defect
to have little or no shadow
differentiate between congenital or acquired color blindness
that the sound beam is directed to the optic disc and the measurement is incorrect

14. How long should the patient be given to recognize the figure in a color plate?
the patient should be tested with near correction - if worn
pressing on the globe too hard with the probe
2 to 3 seconds
545 pm

15. When using color plates - a score indicates abnormal color vision...
2.0 or more
varies according to the type of test
'test eye'
normal tearing

16. A rose bengal does not require the use of...
severe dry eye
the cobalt blue filter
varies according to the type of test
blink

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

18. The Schirmer's test might be indicated in all of the following except...
both eyes equally
dacryocystitis
2 to 3 seconds
for screening purposes - such as job applications

19. Glare testing is used to identify...
decrease in vision due to glare conditions
for screening purposes - such as job applications
focus can he moved off-axis to obtain a clear reading
reading disabilities

20. The photosensitive pigments of the eye are sensitive to...
A-constant
the defect tends to remain stable over time
red - green - and blue
are based on the same general equation

21. Hereditary color defects most often fall into which category?
the use of an anesthetic
A Schirmer's test of 10 mm or more is considered normal.
for screening purposes - such as job applications
red-green

22. 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
can often be cured if the causative factor is eliminated
dacryocystitis
the appearance of dry spots

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

24. Hereditary color vision defects usually affect...
patient wearing spectacles
differentiate between congenital or acquired color blindness
both eyes equally
shine the light flatly from the side - in the plane of the iris

25. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the patient should be tested with near correction - if worn
tear filter papers
patients who have had corneal refractive surgery
IOL power

26. Just prior to the beginning of the TBUT test - the patient is instructed to...
blink
decrease in vision due to glare conditions
normal tearing
posterior subcapsular cataract

27. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
posterior subcapsular cataract
20
ultrasound
reflex tears

28. Almost all of the formulas for calculating IOL power...
20
corneal endothelial drop-out
the patient should be tested with near correction - if worn
are based on the same general equation

29. Schirmer's test II is used to measure...
normal tearing
expensive equipment
IOL power
focus can he moved off-axis to obtain a clear reading

30. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
the appearance of dry spots
narrow beam
corneal endothelial drop-out
having them trace the number/figure

31. When performing pachymetry prior to refractive surgery - it is generally best to begin...
with the central cornea
that the sound beam is directed to the optic disc and the measurement is incorrect
the patient should be tested with near correction - if worn
A Schirmer's test of 10 mm or more is considered normal.

32. Pachymetry readings are routinely taken prior to...
IOL power
refractive surgery
varies according to the type of test
dacryocystitis

33. A TBUT of which of the following would indicate tear film dysfunction?
to the left of the scleral and orbital echoes
10 seconds
both eyes equally
shine the light flatly from the side - in the plane of the iris

34. Rose bengal is...
expensive equipment
a staining agent
red - green - and blue
a narrow angle and bowed iris cast a shadow on the iris

35. Young children can be tested using the color plates by...
to the left of the scleral and orbital echoes
having them trace the number/figure
infrared
2 to 3 seconds

36. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
dacryocystitis
differentiate between congenital or acquired color blindness
a narrow angle and bowed iris cast a shadow on the iris

37. Measuring time for the Schirmer's test is...
IOL power
5 minutes
severe dry eye
to the left of the scleral and orbital echoes

38. Before proceeding with the actual color plate test...
the patient is shown a sample that is discernable to normal and abnormal alike
the use of an anesthetic
reading disabilities
remove the instrument from use

39. Estimating the anterior chamber depth with a penlight works because...
with the central cornea
a narrow angle and bowed iris cast a shadow on the iris
to the left of the scleral and orbital echoes
0.3 mm

40. Schirmer's test does not require _____ except Test strips
expensive equipment
refractive surgery
varies according to the type of test administered
reading disabilities

41. With the 1OLMaster - the ideal signal-to-noise ratio is...
narrow angles may precipitate an angle-closure glaucoma attack
normal tearing
2.0 or more
20

42. _______ are not used in evaluating tear break-up time (TBUT)
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
refractive error
tear filter papers

43. In evaluating an axial length scan - the retinal echo must be...
Allow the patient to adjust to the light level before reading the letters.
desired postoperative refraction
a staining agent
to the left of the scleral and orbital echoes

44. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
545 pm
shine the light flatly from the side - in the plane of the iris
severe dry eye
with the central cornea

45. The ideal IOLMaster axial length graph is...
with the central cornea
holding the probe perpendicular to the corneal surface
0.3 mm
a tall - central spike with only one peak and smaller spikes on either site

46. One of the keys in accurate pachymetry is...
posterior subcapsular cataract
differentiate between congenital or acquired color blindness
holding the probe perpendicular to the corneal surface
the cobalt blue filter

47. When performing the TBUT test - the observer is looking for...
can often be cured if the causative factor is eliminated
desired postoperative refraction
the appearance of dry spots
545 pm

48. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
a narrow angle and bowed iris cast a shadow on the iris
narrow beam
to the left of the scleral and orbital echoes

49. Which eye structure is responsible for color vision?
a tall - central spike with only one peak and smaller spikes on either site
varies according to the type of test
2 to 3 seconds
rods

50. When calculating IOL power - each of the following are necessary except...
'test eye'
white to white corneal diameter
suspected acquired color defect
the cobalt blue filter