人眼無可能經常都最放鬆嘅狀態睇
Contact lenses
In 1960, O. Wichterle and D. Lím[7] described its use in synthesis of hydrophilic crosslinked networks, and these results had great importance for manufacture of soft contact lenses.[5] Polyhydroxyethylmethacrylate is hydrophilic: it is capable of absorbing from 10 to 600% water relative to the dry weight. Because of this property, it was one of the first materials to be used in the manufacture of soft contact lenses.[8]