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Investigation of diffusion and permeability in hydrophilic polymers used for soft contact lenses, indicating significant variations among materials.
Swelling characteristics, weight increase and permeability for H 2 O, glucose and amino acids of six different polymers which have been used for the manufacture of soft contact lenses have been investigated. Results show a great variation of these properties in the various polymers. The permeability studies indicate that diffusion rate depends on the structure of the polymer, the degree of crosslinks and on the water concentration within the hydrated material.
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Gumpelmayer et al. (1973) studied this question.
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