Extreme H2O 59% Xtra are weekly disposable contact lenses produced by Hydrogel Vision Corp. Extreme H2O 59% Xtra are a problem solver for patients who experience significant dryness and discomfort, and need extra durability and handling benefits provided by slightly thicker lens design. Extreme H2O 59% Xtra is made with a group 2 non-ionic material that resists unhealthy protein deposits. These lenses retain 99% of their water content on the eye, even under extreme conditions. All lens dimensions and oxygen permeability present in the first hour of wear, will be present in the last. Lens comfort, movement, and fit will be stable throughout the day.

Lens Material

The non-ionic lens material, hioxifilcon B, is a copolymer of 2-hydroxyethyl methacrylate (2-HEMA) and 2,3-Dihydrosypropyl Methacrylate (Glycerol Methacrylate, GMA). It consists of 52% hioxifilcon B and 48% water by weight when immersed in normal saline solution buffered with sodium bicarbonate.