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The prescription symbol, ℞, as printed on the blister pack of a prescription drug. A prescription, often abbreviated ℞ or Rx, is a formal communication from a physician or other registered healthcare professional to a pharmacist, authorizing them to dispense a specific prescription drug for a specific patient.
The fact that optical powers are approximately additive enables an eye care professional to prescribe corrective lenses as a simple correction to the eye's optical power, rather than doing a detailed analysis of the entire optical system (the eye and the lens). Optical power can also be used to adjust a basic prescription for reading.
Since 1989, five U.S. federal laws and dozens of state laws have been imposed in an attempt to curb the production of methamphetamine. Methamphetamine can be produced in home laboratories using pseudoephedrine or ephedrine, which, at the time, were the active ingredients in over-the-counter drugs such as Sudafed and Contac.
Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both.
Some states further limited the sale of paregoric, or banned over-the-counter sales entirely. For example, Michigan law allowed over-the-counter (non-prescription) sale of paregoric until April 1964, but still allowed OTC sales of certain exempt cough medication preparations that contain 60 mg of codeine per fluid ounce."
Prism spectacles with a single prism perform a relative displacement of the two eyes, thereby correcting eso-, exo, hyper- or hypotropia. In contrast, spectacles with prisms of equal power for both eyes, called yoked prisms (also: conjugate prisms, ambient lenses or performance glasses) shift the visual field of both eyes to the same extent. [5]
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related to: who can prescribe prism glasses over the counterwarbyparker.com has been visited by 10K+ users in the past month
601 N High Street,, Columbus, OH · Directions · (614) 745-8101I'm crazy about Warby Parker. I've bought 26 so far. - Oprah
The quality of the glasses was outstanding. - Bizrate