Contact Lens Power

contact lens
A thin lens, made of flexible or rigid plastic, that is placed directly on to the eye to correct vision, used as an alternative to spectacles, or, if coloured, to change one's eye color cosmetically
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye.
contact: a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
A thin plastic lens placed directly on the surface of the eye to correct visual defects

power
possession of controlling influence; "the deterrent power of nuclear weapons"; "the power of his love saved her"; "his powerfulness was concealed by a gentle facade"
(physics) the rate of doing work; measured in watts (= joules/second)
The capacity or ability to direct or influence the behavior of others or the course of events
supply the force or power for the functioning of; "The gasoline powers the engines"
Political or social authority or control, esp. that exercised by a government
The ability to do something or act in a particular way, esp. as a faculty or quality