Preliminary Observations of Soft (Hydrophilic) Contact Lenses [Abridged]

Sterilization of hydrophilic contact lenses.

Permeability of hydrophilic contact lenses.

Oxygen permeability and water diffusion characteristics were determined for several types of hydroxyethyl-methacrylate hydrophilic contact lenses and a silicone contact lens material. A twoto fourfold difference in the diffusion rates for capillary flow of water was found among the different hydrophilic lenses. Oxygen permeability studies demonstrate that the hydrophilic lenses are capable of t...

Physical properties of hydrophilic gel contact lenses.

Crosby, W. H., and Kugler, H. W. (1957). Amer. 7. dig. Dis., 2, 236. Dutta, N. K., and Habbu, M. K. (1955). Brit. 7. Pharmacol., 10, 153. Panse, M. V., and Kulkarni, D. R. (1959). 7. Bact., 78, 594. Finkelstein, R. A., and Norris, H. T. (1964). Fed. Proc., 23, Abstracts, p. 144. and Dutta, N. K. (1964). 7. infect. Dis., 114, 203. Freter, R., and Gangarosa, E. J. (1963). 7. Immunol., 91, 724. Gr...

Calcium deposition as a cause of spoilation of hydrophilic soft contact lenses.

A series of 75 spoilt soft lenses with opacities (mostly manifesting as discrete spots or as large areas of cloudiness, chalk-white in appearance) were subjected to histochemical, electron microscopical, electron probe x-ray microanalytical, x-ray diffraction, atomic absorption spectro-photometric, and biochemical analyses. The results showed that in many cases calcium was implicated in the dep...

Soft contact lenses in cases of aphakia.

The use of hydrophilic acrylates (POIYHEMA) in the composition of contact lenses was first described by Wichterle and Lim (I960). The development of a spun cast lens has taken several years. The basic technique by Wichterle has now been extended by the manufacturers, Bausch and Lomb. Whilst the low minus powers are available in more than one back curve fitting, the high minus and aphakic series...