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.
OBJECTIVE VS. SUBJECTIVE TESTING. The difference between objective and subjective testing is between methods of evaluating a test. Scoring is objective when no judgement on the part of the scorer is needed. Test items can be evaluated objectively if there is only one right answer and scorers can mark a test by following an answer key.