a polarizing plate is formed with a non - polyvinyl alcohol based polarizing film , a thermoplastic support layer bonded to one surface of the polarizing thin layer , and a thermoplastic protective layer bonded to the other surface of the polarizing thin layer . the thermoplastic support layer is constructed from the same or similar material as the eyewear plastic article base . the thermoplastic protective layer is constructed from a resin sheet that is non - birefringent or highly birefringent . the polarizing plate can be advantageously used in eyewear articles such as sunglasses and goggles for glare reduction . the polarizing plate can be more advantageously used for the production of eyewear optical articles through an insert injection molding technique due to its high heat stability and moisture resistance .