A high percentage of contact lens wearers complain of the decreasing comfort, caused by the contact lens drying out. The goal of the development of the Proclear material is to ensure high wearing comfort during a long daily wearing period.
Phosphorylcholin (PC) is a molecular component, that both in human, animal and plant cells occurs and is recognized as the body's own substance. Biomedical engineering uses PC and others. for bypass, artificial veins and cannulas. CooperVision uses a synthetic copy of the PC to make the Proclear contact lenses.
PC is zwitterionic, d.h. charged positive and negative at the same time, thus non-ionic to the outside. Due to the electrical neutrality, the surface of the contact lens does not tend to form deposits, z.B. Lipids and proteins from the tear film.

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