<prompt> Foldable lens is made up of?PMMASiliconHydrogelNone  <response>: Ans. is b i.e., Silicon Depending on the material of manufacturing, following types of IOLs are there :- Rigid IOLs :- Made entirely from polymethyl methacrylate PMMA. Foldable 10Ls :- Are used after phacoemulsification and are made of silicon, acrylic, hydrogel and collamer. Rollable 10Ls :- Ultra thin IOLs and are sued after phokonit technique micro- incision : lmm. These are made of hydrogel. 