Japan Synthetic Rubber Co., Ltd.

Ricky Contact Lens Research Institute Inc.

Ricky Contact Lens, Inc.

Noboru Satoh

Taro Suminoe

Takao Shimizu

Tetsuo Itoh

Kazuhiko Takahashi

A non-hydrous soft contact lens comprising a copolymer comprising, as monomer units:

Non-hydrous soft contact lens and process for producing the same

A non-hydrous soft contact lens comprising a copolymer comprising, as monomer units, 49.9 to 95 mole % of an acrylate represented by Formula (I) shown below, 0 to 10 mole % of acrylic acid or the specified ester thereof, 4.9 to 50 mole % of a methacrylate represented by Formula (II) shown below, and 0.1 to 10 mole % of a crosslinking monomer. ##STR1## wherein R.sup.1 is at least one selected from the group consisting of a particular straight chain fluoroalkyl group and a particular straight chain alkyl group. ##STR2## wherein R.sup.2 is a particular straight chain fluoroalkyl group. The present soft contact lens requires no sterilization by boiling, and has good resistance to stain, good oxygen permeability, good elastic recovery and good shape stability. A process for producing the above non-hydrous soft contact lens, comprising the step of subjecting a rigid precursor lens to treatment(s) of esterification and/or transesterification, is also disclosed.

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Yokohama, Japan

Noboru Satoh