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. How long should the patient be given to recognize the figure in a color plate?
white to white corneal diameter
a malingerer may invent a number - thus identifying him- or herself
2 to 3 seconds
the patient should be tested with near correction - if worn

2. The IOLMaster evaluates each of the following except...
decrease in vision due to glare conditions
rods
refractive error
the appearance of dry spots

3. Which of the following should be color-vision tested one eye at a time?
IOL power
the appearance of dry spots
suspected acquired color defect
refractive surgery

4. A TBUT of which of the following would indicate tear film dysfunction?
ultrasound
10 seconds
the defect tends to remain stable over time
a malingerer may invent a number - thus identifying him- or herself

5. Illumination for the color plates test...
varies according to the type of test administered
'test eye'
patient wearing spectacles
are based on the same general equation

6. When calculating intraocular lens (IOL) powers - one must enter...
the patient is shown a sample that is discernable to normal and abnormal alike
holding the probe perpendicular to the corneal surface
more males than females
desired postoperative refraction

7. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
remove the instrument from use
blink
is acceptable
suspected acquired color defect

8. Measuring corneal thickness via nonoptical pachymetry involves the use of...
to the left of the scleral and orbital echoes
reflex tears
IOL power
ultrasound

9. Which eye structure is responsible for color vision?
a tall - central spike with only one peak and smaller spikes on either site
ultrasound
differentiate between congenital or acquired color blindness
rods

10. 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 angles may precipitate an angle-closure glaucoma attack
that the sound beam is directed to the optic disc and the measurement is incorrect
shine the light flatly from the side - in the plane of the iris
decrease in vision due to glare conditions

11. A patient with which of the following potential diagnoses would be tested with bengal?
refractive error
severe dry eye
pressing on the globe too hard with the probe
3.0 D

12. 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
varies according to the type of test
narrow angles may precipitate an angle-closure glaucoma attack
A-constant

13. Schirmer's test II is used to measure...
rods
that the sound beam is directed to the optic disc and the measurement is incorrect
normal tearing
to have little or no shadow

14. In evaluating an axial length scan - the retinal echo must be...
to the left of the scleral and orbital echoes
differentiate between congenital or acquired color blindness
patient wearing spectacles
shortened axial length due to compression

15. 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?
remove the instrument from use
10 seconds
one-fourth
A Schirmer's test of 10 mm or more is considered normal.

16. 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
the use of an anesthetic
10 seconds

17. The type of pachymetry used to evaluate a glaucoma suspect is...
A Schirmer's test of 10 mm or more is considered normal.
refractive surgery
central corneal thickness
posterior subcapsular cataract

18. 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
A Schirmer's test of 10 mm or more is considered normal.
remove the instrument from use
pressing on the globe too hard with the probe

19. An A-Sean can he artificially shortened due to...
the cobalt blue filter
pressing on the globe too hard with the probe
shine the light flatly from the side - in the plane of the iris
Allow the patient to adjust to the light level before reading the letters.

20. The average central thickness of the human cornea is...
normal tearing
varies according to the type of test
central corneal thickness
545 pm

21. Young children can be tested using the color plates by...
having them trace the number/figure
3.0 D
varies according to the type of test administered
central corneal thickness

22. Schirmer's test does not require _____ except Test strips
expensive equipment
23 to 24 mm
with the central cornea
10 seconds

23. The ideal IOLMaster axial length graph is...
10 seconds
infrared
a tall - central spike with only one peak and smaller spikes on either site
red-green

24. When should a child have his or her color vision checked?
before starting school
can often be cured if the causative factor is eliminated
the appearance of dry spots
2 to 3 seconds

25. Almost all of the formulas for calculating IOL power...
5 minutes
desired postoperative refraction
blink
are based on the same general equation

26. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
the appearance of dry spots
having them trace the number/figure
patients who have had corneal refractive surgery
severe dry eye

27. 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?
narrow beam
0.3 mm
shine the light flatly from the side - in the plane of the iris
545 pm

28. Laser interferometry uses which type of laser light?
can often be cured if the causative factor is eliminated
reading disabilities
a staining agent
infrared

29. Each of the following can cause an error in the axial length scan reading of the IOL Master except...
patient wearing spectacles
one-fourth
Allow the patient to adjust to the light level before reading the letters.
a staining agent

30. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
narrow beam
refractive error
the defect tends to remain stable over time
3.0 D

31. The photosensitive pigments of the eye are sensitive to...
are based on the same general equation
reading disabilities
red - green - and blue
that the sound beam is directed to the optic disc and the measurement is incorrect

32. This is not evaluated using rose Bengal except...
narrow beam
reflex tears
shine the light flatly from the side - in the plane of the iris
corneal endothelial drop-out

33. Rose bengal is...
remove the instrument from use
blink
Allow the patient to adjust to the light level before reading the letters.
a staining agent

34. Estimating the anterior chamber depth with a penlight works because...
patients who have had corneal refractive surgery
a narrow angle and bowed iris cast a shadow on the iris
infrared
545 pm

35. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
20
shortened axial length due to compression
dacryocystitis
can often be cured if the causative factor is eliminated

36. When using a penlight to estimate anterior chamber depth - an open angle would appear...
infrared
are based on the same general equation
to have little or no shadow
reading disabilities

37. When positioning the IOLMaster for the axial length reading...
before starting school
545 pm
red-green
focus can he moved off-axis to obtain a clear reading

38. Measuring time for the Schirmer's test is...
the defect tends to remain stable over time
2.0 or more
that the sound beam is directed to the optic disc and the measurement is incorrect
5 minutes

39. A color plate that shows no obvious number to normal and abnormal alike is useful because...
shortened axial length due to compression
varies according to the type of test administered
remove the instrument from use
a malingerer may invent a number - thus identifying him- or herself

40. When using color plates - a score indicates abnormal color vision...
varies according to the type of test
red-green
IOL power
both eyes equally

41. With the 1OLMaster - the ideal signal-to-noise ratio is...
expensive equipment
ultrasound
10 seconds
2.0 or more

42. When performing the TBUT test - the observer is looking for...
the cobalt blue filter
expensive equipment
red-green
the appearance of dry spots

43. A rose bengal does not require the use of...
a staining agent
the cobalt blue filter
suspected acquired color defect
varies according to the type of test administered

44. One of the keys in accurate pachymetry is...
2.0 or more
the use of an anesthetic
holding the probe perpendicular to the corneal surface
both eyes equally

45. Color vision testing is used to detect all of the following except...
varies according to the type of test administered
are based on the same general equation
differentiate between congenital or acquired color blindness
pressing on the globe too hard with the probe

46. 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
red-green
refractive surgery

47. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
white to white corneal diameter
shine the light flatly from the side - in the plane of the iris
is acceptable
tear filter papers

48. When performing pachymetry prior to refractive surgery - it is generally best to begin...
patients who have had corneal refractive surgery
with the central cornea
expensive equipment
the cobalt blue filter

49. Pachymetry readings are routinely taken prior to...
IOL power
narrow beam
refractive surgery
for screening purposes - such as job applications

50. Hereditary color vision defects usually affect...
both eyes equally
0.3 mm
a malingerer may invent a number - thus identifying him- or herself
'test eye'