PC technology™

Dryness and discomfort over the course of the day are among the most common complaints from contact lens wearers.1

PC Technology™ allows lenses to incorporate phosphoryl choline (PC), a highly hydrophilic compound found naturally in the cells of the eye and the body. It strongly binds water to the lens surface, and throughout the lens, reducing the rapid evaporation that can lead to dryness.2

The result is a highly biocompatible lens that imitates substances found on the cells of the human eye.

How it works

PC Technology™ is not an additive, coating or surface treatment. It follows nature’s example using advanced molecular science. PC Technology™ mimics substances found naturally on the outside of every cell, including cells of the human eye. As a result, CooperVision® Proclear® 1-day contact lenses attract water and thereby help maintain hydration.

PC Technology™ lowers the risk of dehydration, sustains the flow of oxygen and reduces deposits. 3 

A protective “shield” of water is created around the lens when phosphoryl choline molecules bind with water molecules in natural tears. As a result, PC Technology™:

  • Lowers the risk of dehydration and sustains the flow of oxygen.
  • Gives the lens a more deposit-resistant surface, thus reducing the risk of lens irritation.
  • Provides natural wettability, reducing the build-up of lipids and proteins throughout the day.

PC Technology™ lenses retain up to 97% of their original water content, even after 12 hours of wear, to provide your patients with day-long comfort.4


1 Dumbleton K, Caffery B, Dogru M, et al. The TFOS International Workshop on Contact Lens Discomfort: Report of the Subcommittee on Epidemiology. Investigative Ophthalmology & Visual Science Invest Ophthalmol Vis Sci. 2013;54(11). doi:10.1167/iovs.13-13125.

2 Hall B, Jones S, Young G, Coleman S. The on-eye dehydration of Proclear Compatibles lenses. CLAO J. 1999;25(4):233-237.

3 Hall B, Jones S. Clinical performance of a monthly lens and patient comfort. Contact Lens Spectrum. December 2000.

4 A prospective, single-centre, double-masked, contralateral eye, randomised, daily wear, one-day non-dispensing study. 21 subjects. A gravimetric method was used to determine the lens water content and dehydration during the 12 hours of lens wear.