Opti-view is the result of original technology aimed at obtaining precise corrective opthalmic lanses with physical/chemical characteristics guaranteed by the use of T.S.-46 TOKOYAMA-JAPAN basic product. The advantage achieved can be summed up as follows: Extremely pure polymer Elimination of harmfull U.V. rays to 380 NM. Fast, perfect colouring As well as this, there is also the more obvious advantage of the basic curves used, which have earned Opti-view their reputation as opticians favourite organic lenses. Material: Polymer Thermo Hardened Diethylenglycol bi Allicarbonate.