Term used by eye care professionals to describe lenses with no focusing power The term is most often applied to nonprescription sunglasses or contact lenses that are worn for cosmetic purposes only
Combining forms signifying flat, level, plane; as planifolious, planimetry, plano- concave
In optics, an optical surface which has been made substantially flat, the degree of flatness depending upon the performance required A plano-convex lens is a positive lens with one surface flat and the other convex In the dictionary, plano is given only as a combining form, but in practical optics it is often used alone to denote any particularly flat surface-- that has been worked flat See optical flat
A term eyecare professionals use to describe lenses with no corrective power The term is most often applied to nonprescription sunglasses or contact lenses that are worn for cosmetic purposes only