Resin waa walax kiimiko ah oo leh qaab dhismeed phenolic ah. Lens resin waa miisaan fudud, caabbinta heerkulka sare, caabbinta saamaynta ma fududa in la jabiyo, jabay sidoo kale ma laha geeso iyo geeso, ammaan ah, si wax ku ool ah u xannibi kara fallaadhaha ultraviolet, lens resin sidoo kale waa nooca muraayadaha indhaha ee dadka myopia wakhtigan.