Resin chinhu chemakemikari chine phenolic chimiro. Resin lens uremu huremu, kupisa kwekushisa kwepamusoro, kuramba kukanganiswa hakusi nyore kutyora, kwakatyoka zvakare haina mipendero nemakona, yakachengeteka, inogona kunyatsovharisa ultraviolet rays, resin lens zvakare imhando yaunofarira magirazi emeso kune myopia vanhu parizvino.