Top nicardipine Related Articles. 1  amlodipine Amlodipine besylate (Norvasc) is a drug that belongs to the drug class of calcium channel blockers (CCBs), and is prescribed for the treatment and prevention of angina (heart or chest pain) that results from coronary spasm and from exertion.
By age 3 or 4 years, most children are able to cooperate for subjective visual acuity testing using an eye chart. If a child is unable to cooperate for visual acuity testing at age 3, a second attempt should be made within 6 months, if the child is age 4, a second attempt should be made within one month.
Here are a few more forms of bias to consider. Subjective interpretations may be biased by prior knowledge. Diagnostic review bias occurs when interpretation of the gold standard test is made with knowledge of the test under investigation or other clinical data. Incorporation bias occurs when results of the test under study are actually used to make the final diagnosis.