Menicon Co., Ltd.

Toshikazu Miura

Yuki Tanaka

Yasuyoshi Yamamoto

Keisuke Yamamoto

Seiichi Ichikawa

Takashi Goto

Katsuhiro Iwai

Hiroyuki Tajima

Shota Nagao

Masahiro Sasaki

Contact lens case

A method of producing an ocular lens, comprising the steps of: (a) preparing a lens blank which gives an ocular lens, the lens blank having a concave back surface and a convex front surface, at least a portion of the front surface being tapered to give a tapered surface; (b) forming a back curved surface of the ocular lens by effecting a cutting operation on the concave back surface of the lens blank, while the lens blank is supported on a spindle of a back surface cutting device such that the tapered surface of the lens blank is drawn onto a tapered holding surface of the spindle under a negative pressure applied to the lens blank, the tapered holding surface following a profile of the tapered surface of the lens blank; and (c) forming a front curved surface of the ocular lens by effecting a cutting operation on the front surface of the lens blank whose back surface has been cut to form the back curved surface, while the lens blank is supported on a spindle of a front surface cutting device such that the back curved surface of the lens blank is drawn onto a holding surface of the spindle of the front surface cutting device under a negative pressure applied to the lens blank.

Method of producing ocular lens and holders for holding lens blank during cutting thereof

Growing community of inventors

Kakamigahara, Japan

Toshikazu Miura