Aqua-Sense IOLs are manufactured using Aaren’s proprietary P.U.R.E. System (Precision UnResolved-materials Extraction). P.U.R.E. is a unique molecular cleaning method developed by Aaren Scientific to remove materials and extraneous processing materials found in hydrophilic lenses that are not fully polymerized. All Aqua-Sense lenses that go through the P.U.R.E. system have enduring optical clarity and enhanced biocompatibility.