Also known as: PB-
PB has various meanings in the Medicine category. Discover the full forms, definitions, and usage contexts of PB in Medicine.
A placebo is a substance or treatment with no active therapeutic effect. A placebo may be given to a person in order to deceive the recipient into thinking that it is an active treatment. In drug testing and medical research, a placebo can be made to resemble an active medication or therapy so that it functions as a control; this is to prevent the recipient(s) and/or others from knowing whether a treatment is active or inactive, as expectations about efficacy can influence results.
MedicinePresbyopia is a defect of vision in which objects are not clearly visible due to weakening of eye muscles in old age. It is overcome by the use of suitable lenses in the same frame.
MedicineBarometric pressure (also known as atmospheric pressure) is the force exerted by the atmosphere at a given point. It is known as the "weight of the air". A barometer measures barometric pressure. Measurement of barometric pressure can be expressed in millibars(mb) or in inches or millimeters of mercury (Hg). Normal pressure at sea level is 1013.3 millibars or 29.92 inches of mercury.
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