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. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
varies according to the type of test administered
rods
is acceptable
20

2. A rose bengal does not require the use of...
focus can he moved off-axis to obtain a clear reading
the cobalt blue filter
dacryocystitis
Allow the patient to adjust to the light level before reading the letters.

3. When using a penlight to estimate anterior chamber depth - an open angle would appear...
posterior subcapsular cataract
corneal endothelial drop-out
IOL power
to have little or no shadow

4. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
3.0 D
20
2 to 3 seconds
reflex tears

5. When performing pachymetry prior to refractive surgery - it is generally best to begin...
545 pm
both eyes equally
a tall - central spike with only one peak and smaller spikes on either site
with the central cornea

6. The axial length of an average adult eye is...
infrared
patients who have had corneal refractive surgery
3.0 D
23 to 24 mm

7. In evaluating an axial length scan - the retinal echo must be...
IOL power
to the left of the scleral and orbital echoes
shine the light flatly from the side - in the plane of the iris
a malingerer may invent a number - thus identifying him- or herself

8. When using color plates - a score indicates abnormal color vision...
pressing on the globe too hard with the probe
varies according to the type of test
to have little or no shadow
2 to 3 seconds

9. Schirmer's test II is used to measure...
3.0 D
normal tearing
the appearance of dry spots
having them trace the number/figure

10. Before proceeding with the actual color plate test...
0.3 mm
that the sound beam is directed to the optic disc and the measurement is incorrect
the patient is shown a sample that is discernable to normal and abnormal alike
dacryocystitis

11. Color vision testing is used to detect all of the following except...
the use of an anesthetic
differentiate between congenital or acquired color blindness
2 to 3 seconds
having them trace the number/figure

12. When calculating IOL power - each of the following are necessary except...
white to white corneal diameter
red-green
'test eye'
both eyes equally

13. A measurement error of 1 mm in an axial eye length could result in an unwanted postoperative refractive error of as much as...
with the central cornea
patient wearing spectacles
3.0 D
red-green

14. The Schirmer's test might be indicated in all of the following except...
is acceptable
a narrow angle and bowed iris cast a shadow on the iris
3.0 D
dacryocystitis

15. A color plate that shows no obvious number to normal and abnormal alike is useful because...
both eyes equally
normal tearing
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself

16. Illumination for the color plates test...
rods
shortened axial length due to compression
varies according to the type of test administered
infrared

17. A patient with which of the following potential diagnoses would be tested with bengal?
focus can he moved off-axis to obtain a clear reading
can often be cured if the causative factor is eliminated
severe dry eye
suspected acquired color defect

18. Schirmer's test does not require _____ except Test strips
for screening purposes - such as job applications
expensive equipment
to have little or no shadow
tear filter papers

19. Schirmer's test I is used to measure...
having them trace the number/figure
reflex tears
narrow angles may precipitate an angle-closure glaucoma attack
545 pm

20. Which of the following should be color-vision tested one eye at a time?
suspected acquired color defect
ultrasound
having them trace the number/figure
shortened axial length due to compression

21. The axial length of the eye is important in the calculation of...
IOL power
expensive equipment
a staining agent
before starting school

22. Hereditary color vision defects usually affect...
to the left of the scleral and orbital echoes
both eyes equally
A-constant
focus can he moved off-axis to obtain a clear reading

23. _______ are not used in evaluating tear break-up time (TBUT)
tear filter papers
shortened axial length due to compression
Allow the patient to adjust to the light level before reading the letters.
reading disabilities

24. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
infrared
patients who have had corneal refractive surgery
are based on the same general equation
A-constant

25. Acquired color vision defects...
the cobalt blue filter
varies according to the type of test
can often be cured if the causative factor is eliminated
reading disabilities

26. The difference between Schirmer's test I and II is...
10 seconds
the use of an anesthetic
ultrasound
can often be cured if the causative factor is eliminated

27. Just prior to the beginning of the TBUT test - the patient is instructed to...
refractive error
corneal endothelial drop-out
infrared
blink

28. The photosensitive pigments of the eye are sensitive to...
varies according to the type of test
5 minutes
A-constant
red - green - and blue

29. Color vision defects in children are frequently detected among those with...
a staining agent
2.0 or more
reading disabilities
is acceptable

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

31. In which of the following would glare testing be most appropriate?
posterior subcapsular cataract
a staining agent
to the left of the scleral and orbital echoes
a tall - central spike with only one peak and smaller spikes on either site

32. Rose bengal is...
a staining agent
narrow beam
shortened axial length due to compression
before starting school

33. When performing a brightness acuity glare test - it is best to do which of the following?
that the sound beam is directed to the optic disc and the measurement is incorrect
more males than females
pressing on the globe too hard with the probe
Allow the patient to adjust to the light level before reading the letters.

34. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
with the central cornea
shine the light flatly from the side - in the plane of the iris
both eyes equally

35. Measuring corneal thickness via nonoptical pachymetry involves the use of...
more males than females
ultrasound
IOL power
central corneal thickness

36. 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 staining agent
0.3 mm
23 to 24 mm

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

38. Laser interferometry uses which type of laser light?
corneal endothelial drop-out
can often be cured if the causative factor is eliminated
pressing on the globe too hard with the probe
infrared

39. How long should the patient be given to recognize the figure in a color plate?
the use of an anesthetic
23 to 24 mm
2 to 3 seconds
rods

40. The ideal IOLMaster axial length graph is...
a tall - central spike with only one peak and smaller spikes on either site
infrared
the patient is shown a sample that is discernable to normal and abnormal alike
the cobalt blue filter

41. If a biometry instrument fails to calibrate properly - one should...
remove the instrument from use
having them trace the number/figure
to the left of the scleral and orbital echoes
before starting school

42. 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?
shine the light flatly from the side - in the plane of the iris
suspected acquired color defect
for screening purposes - such as job applications
one-fourth

43. Estimating the anterior chamber depth with a penlight works because...
expensive equipment
refractive surgery
a narrow angle and bowed iris cast a shadow on the iris
varies according to the type of test administered

44. The type of pachymetry used to evaluate a glaucoma suspect is...
more males than females
shortened axial length due to compression
dacryocystitis
central corneal thickness

45. An A-Sean can he artificially shortened due to...
patient wearing spectacles
10 seconds
pressing on the globe too hard with the probe
one-fourth

46. In test a patient with the color pseudoisochromatic plates...
patients who have had corneal refractive surgery
narrow angles may precipitate an angle-closure glaucoma attack
desired postoperative refraction
the patient should be tested with near correction - if worn

47. The Ishihara color plates are useful...
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
red-green
before starting school

48. When should a child have his or her color vision checked?
to have little or no shadow
corneal endothelial drop-out
before starting school
holding the probe perpendicular to the corneal surface

49. The average central thickness of the human cornea is...
narrow angles may precipitate an angle-closure glaucoma attack
545 pm
having them trace the number/figure
suspected acquired color defect

50. It is important to estimate the anterior chamber depth prior to dilation because...
narrow angles may precipitate an angle-closure glaucoma attack
0.3 mm
the use of an anesthetic
shine the light flatly from the side - in the plane of the iris