Ma lens a resin General ndi zinthu zolimba zotentha, ndiye kuti, zopangira ndi zamadzimadzi, ndipo ma lens olimba amapangidwa pambuyo potentha. Ma lens a PC, omwe amadziwikanso kuti "magalasi am'mlengalenga", "magalasi akumlengalenga", omwe amatchedwa polycarbonate, ndi zinthu zopangira thermoplastic.