common tests

a chain of __ is required when collecting and handling specimens for drug testing for employment or a court subpoena

custody

a chain of custody ensures

tampering does not occur

for a urine test that requires testing for bilirubin, what special handling does this need

dark container to protect from light

what is the most common type of color blindness

red-green deficiency

visual field testing also known as perimetry testing helps detect

eye diseases

glaucoma is a

eye disease

near vision testing screens for

presbyopia or hyperopia

what type of testing is this: instruct the patients to look straight ahead and respond to instructions. in an automated test, patients respond to seeing lights flash while in a manual test, patients identify when they can see hands or fingers in their peripheral vision

visual field testing

what type of testing is this: ask the patient to read printed material of various sizes 14 to 16 in away from the eyes without corrective lenses. test each eye separately and then both together, the level at which the patient can read the smallest printing clearly is the result

near vision testing

distance vision testing is used to evaluate

myopia

what type of testing is this: patients stand 20 feet from a chart at eye level and identify letters, shapes or the direction an “E” is pointing, the eyes test separately and together, but the patient can wear corrective lenses during the test, the line at which the patient can clearly see the letters or pictures is the result, the patient can miss one item and still pass that line and the vision is recorded as a fraction, with 20/20 representing normal vision

distance vision testing

records movement of the tympanic membrane which can be affected by increased pressure in the middle ear & helps determine presence of fluid and potential infections in the middle ear

tympanometry

a normal tympanogram produces a __ on the graph while an abnormal one produces a __

peak; flat line

an adult who has normal hearing should be able to hear tones at __ while children should hear at __

25 decibels; 15 decibels

what type of testing is this: raising a hand to acknowledge when various tones are heard through headphones

audiometry

these are used to determine the patient’s ability to hear tones transmitted through air and bone conduction

tuning forks