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. If a biometry instrument fails to calibrate properly - one should...
A Schirmer's test of 10 mm or more is considered normal.
shortened axial length due to compression
remove the instrument from use
to the left of the scleral and orbital echoes

2. How long should the patient be given to recognize the figure in a color plate?
2 to 3 seconds
narrow angles may precipitate an angle-closure glaucoma attack
2.0 or more
expensive equipment

3. 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?
the patient should be tested with near correction - if worn
one-fourth
reflex tears
2.0 or more

4. When calculating intraocular lens (IOL) powers - one must enter...
desired postoperative refraction
are based on the same general equation
varies according to the type of test administered
dacryocystitis

5. The average central thickness of the human cornea is...
545 pm
'test eye'
can often be cured if the causative factor is eliminated
refractive surgery

6. Laser interferometry uses which type of laser light?
infrared
a staining agent
Allow the patient to adjust to the light level before reading the letters.
is acceptable

7. When using a penlight to estimate anterior chamber depth - an open angle would appear...
decrease in vision due to glare conditions
to have little or no shadow
reading disabilities
central corneal thickness

8. When using a penlight to estimate the depth of the anterior chamber - the following technique is best...
shine the light flatly from the side - in the plane of the iris
more males than females
the use of an anesthetic
with the central cornea

9. When performing a brightness acuity glare test - it is best to do which of the following?
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.
white to white corneal diameter
red-green

10. One of the keys in accurate pachymetry is...
is acceptable
for screening purposes - such as job applications
narrow angles may precipitate an angle-closure glaucoma attack
holding the probe perpendicular to the corneal surface

11. Almost all of the formulas for calculating IOL power...
are based on the same general equation
3.0 D
refractive error
reflex tears

12. When calculating IOL power - each of the following are necessary except...
decrease in vision due to glare conditions
white to white corneal diameter
a tall - central spike with only one peak and smaller spikes on either site
suspected acquired color defect

13. When positioning the IOLMaster for the axial length reading...
focus can he moved off-axis to obtain a clear reading
A-constant
red-green
posterior subcapsular cataract

14. Estimating the anterior chamber depth with a penlight works because...
a narrow angle and bowed iris cast a shadow on the iris
the defect tends to remain stable over time
3.0 D
varies according to the type of test

15. Glare testing is used to identify...
decrease in vision due to glare conditions
10 seconds
the patient should be tested with near correction - if worn
a malingerer may invent a number - thus identifying him- or herself

16. Before proceeding with the actual color plate test...
0.3 mm
3.0 D
the patient is shown a sample that is discernable to normal and abnormal alike
holding the probe perpendicular to the corneal surface

17. Measuring corneal thickness via nonoptical pachymetry involves the use of...
ultrasound
a narrow angle and bowed iris cast a shadow on the iris
0.3 mm
for screening purposes - such as job applications

18. Acquired color vision defects...
the cobalt blue filter
narrow angles may precipitate an angle-closure glaucoma attack
a narrow angle and bowed iris cast a shadow on the iris
can often be cured if the causative factor is eliminated

19. Color vision testing is used to detect all of the following except...
A-constant
'test eye'
the patient should be tested with near correction - if worn
differentiate between congenital or acquired color blindness

20. You are inputting data for IOL calculations and notice that the K readings 44.5/42.75. This type of reading...
is acceptable
Allow the patient to adjust to the light level before reading the letters.
dacryocystitis
severe dry eye

21. Schirmer's test I is used to measure...
20
reflex tears
shortened axial length due to compression
central corneal thickness

22. The Ishihara color plates are useful...
expensive equipment
infrared
is acceptable
for screening purposes - such as job applications

23. Measuring time for the Schirmer's test is...
red-green
5 minutes
to the left of the scleral and orbital echoes
to have little or no shadow

24. When should a child have his or her color vision checked?
2 to 3 seconds
2.0 or more
before starting school
white to white corneal diameter

25. For safety reasons - the limit for the number of readings that may he taken per eye per day with the 101.Master is...
with the central cornea
shortened axial length due to compression
20
focus can he moved off-axis to obtain a clear reading

26. The axial length of the eye is important in the calculation of...
IOL power
23 to 24 mm
severe dry eye
white to white corneal diameter

27. Young children can be tested using the color plates by...
3.0 D
before starting school
10 seconds
having them trace the number/figure

28. Hereditary color defects most often fall into which category?
red-green
desired postoperative refraction
severe dry eye
is acceptable

29. The axial length of an average adult eye is...
varies according to the type of test administered
23 to 24 mm
to the left of the scleral and orbital echoes
having them trace the number/figure

30. Illumination for the color plates test...
reflex tears
2.0 or more
pressing on the globe too hard with the probe
varies according to the type of test administered

31. Just prior to the beginning of the TBUT test - the patient is instructed to...
narrow angles may precipitate an angle-closure glaucoma attack
the patient is shown a sample that is discernable to normal and abnormal alike
blink
a staining agent

32. 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
blink
posterior subcapsular cataract
that the sound beam is directed to the optic disc and the measurement is incorrect

33. If the patient is suspected of having an acquired color vision defect - all of the following apply except...
to the left of the scleral and orbital echoes
the defect tends to remain stable over time
remove the instrument from use
before starting school

34. When performing the TBUT test - the observer is looking for...
one-fourth
the appearance of dry spots
holding the probe perpendicular to the corneal surface
a malingerer may invent a number - thus identifying him- or herself

35. 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?
reflex tears
0.3 mm
blink
more males than females

36. Which of the following poses problems in obtaining accurate measurements for IOL calculations?
remove the instrument from use
patients who have had corneal refractive surgery
differentiate between congenital or acquired color blindness
decrease in vision due to glare conditions

37. Color vision defects in children are frequently detected among those with...
reading disabilities
the use of an anesthetic
one-fourth
3.0 D

38. The type of pachymetry used to evaluate a glaucoma suspect is...
are based on the same general equation
central corneal thickness
a malingerer may invent a number - thus identifying him- or herself
more males than females

39. An A-Sean can he artificially shortened due to...
A-constant
'test eye'
3.0 D
pressing on the globe too hard with the probe

40. It is important to estimate the anterior chamber depth prior to dilation because...
tear filter papers
shortened axial length due to compression
narrow angles may precipitate an angle-closure glaucoma attack
severe dry eye

41. The Schirmer's test might be indicated in all of the following except...
desired postoperative refraction
the cobalt blue filter
is acceptable
dacryocystitis

42. In which of the following would glare testing be most appropriate?
a narrow angle and bowed iris cast a shadow on the iris
corneal endothelial drop-out
tear filter papers
posterior subcapsular cataract

43. The ideal IOLMaster axial length graph is...
Allow the patient to adjust to the light level before reading the letters.
a tall - central spike with only one peak and smaller spikes on either site
narrow beam
varies according to the type of test administered

44. Hereditary color vision defects usually affect...
a malingerer may invent a number - thus identifying him- or herself
the cobalt blue filter
both eyes equally
2.0 or more

45. The difference between Schirmer's test I and II is...
0.3 mm
the use of an anesthetic
the appearance of dry spots
central corneal thickness

46. Rose bengal is...
a staining agent
one-fourth
2 to 3 seconds
focus can he moved off-axis to obtain a clear reading

47. Which of the following should be color-vision tested one eye at a time?
refractive error
is acceptable
suspected acquired color defect
one-fourth

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

49. Schirmer's test II is used to measure...
0.3 mm
normal tearing
a narrow angle and bowed iris cast a shadow on the iris
reflex tears

50. When evaluating anterior chamber depth with the slit lump - the illumination technique used is...
the use of an anesthetic
narrow beam
expensive equipment
20