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Soft contact lens and method of manufacturing the same

  • US 4,966,924 A
  • Filed: 05/15/1989
  • Issued: 10/30/1990
  • Est. Priority Date: 02/13/1986
  • Status: Expired due to Fees
First Claim
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1. A soft contact lens of poly(vinyl alcohol), consisting essentially of microcrystalline poly(vinyl alcohol) crosslinked by irradiation with electron beams or radioactive rays, prepared by crystallizing a poly(vinyl alcohol) at a temperature of not more than 0°

  • C., and having a tensile strength greater than 10kg/cm2, a water content ranging from 40 to 95% by weight, a visible light transparency of not less than 90%, and an oxygen permeability of not less than 30×

    10-11 cm 3 (STP) cm/cm2 sec mmHg.

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