Question

Polymer used for making contact lenses for eyes

Answer 1

The raw material for contact lenses is a plastic polymer. (A polymer is a blend of materials created by linking the molecules of different chemical substances.) Hard contact lenses are made of some variant of polymethyl methacrylate (PMMA). Soft contact lenses are made of a polymer such as poly hydroxyethyl methacrylate (pHEMA) that has hydrophilic qualities, that is, it can soak up water and still retain its shape and optic functions. The science of lens material is always being updated by lens manufacturers, and the specific material of any contact lens may differ depending on the maker.

Read more: http://www.madehow.com/Volume-2/Contact-Lens.html#ixzz5EHNSl82s

Answer 2

PolyMethylMethAcrylate (PMMA).