05061057 is referenced by 3 patents and cites 18 patents.

In order to make hard and soft contact lenses having a pore diameter and a pore density optimum for use as oxygen permeable contact lenses, the contact lens after molding is subjected to irradiation of a polyvalent heavy ion beam having a mass number of 2 to 100 (preferably 10 to 80) and an ion energy of 10M eV (preferably 50M eV) or higher, at an ion radiation density of 10 to 10.sup.9 ions/cm.sup.2 (preferably 10.sub.2 to 10.sub.5 ions/cm.sup.2) and thereafter ultrasonically etched (preferably at 10 to 50 MHz) at a temperature of 4 to 50.degree. C. (preferably 10.degree. to 30.degree. C.) in the presence of chloroacetic acid (preferably tricholoracetic acid).

Title
Porous contact lens and method for making it
Application Number
7/357320
Publication Number
5061057
Application Date
May 25, 1989
Publication Date
October 29, 1991
Inventor
Hideo Kohyama
Ohmiya
JP
Toshiyuki Itoh
Ohmiya
JP
Takashi Ohno
Ohta
JP
Yasuji Sejima
Chofu
JP
Ryuji Arai
Toshima
JP
Tsutomu Sakurai
Tokai
JP
Yoshihide Komaki
Katsuta
JP
Isao Kaetsu
Takatsuki
JP
Minoru Kumakura
Maebashi
JP
Agent
Christensen O Connor Johnson & Kindness
Assignee
Japan Atomic Energy Research Institute
JP
IPC
G02C 7/04
View Original Source