发明授权
- 专利标题: Adjustable devices for corneal curvature adjustment
- 专利标题(中): 用于角膜曲率调节的可调节装置
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申请号: US948079申请日: 1992-09-21
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公开(公告)号: US5300118A公开(公告)日: 1994-04-05
- 发明人: Thomas Silvestrini , Mark Mathis , Bryan Loomas
- 申请人: Thomas Silvestrini , Mark Mathis , Bryan Loomas
- 申请人地址: CA Santa Clara
- 专利权人: Keravision
- 当前专利权人: Keravision
- 当前专利权人地址: CA Santa Clara
- 主分类号: A61F9/00
- IPC分类号: A61F9/00 ; A61F2/14 ; A61M31/00
摘要:
The intrastromal corneal ring (ICR) is adjustable in thickness and has an elongated, flexible, preferably transparent or translucent body which forms a circle. The ICR is of a size such that it can be inserted into a human eye and is comprised of a material which is compatible with human ocular tissue. The thickness of the ring can be adjusted so that it is not necessary to stock a plurality of different rings of different sizes to be used in connection with a method of adjusting the shape of the cornea of the eye. A plurality of different embodiments of ICRs are disclosed each of which are adjustable in terms of their thickness. The thickness may be adjusted prior to the insertion of the ICR into the cornea and may not be further adjustable after insertion. However, in accordance with preferred embodiments the ICR is inserted at a thickness which is believed to be proper and may thereafter be further adjusted in order to precisely define the desired thickness and thereby more precisely adjust the shape of the cornea and focus the light entering the eye on the retina.
公开/授权文献
- US4775179A Aerodynamically contoured sleeper apparatus 公开/授权日:1988-10-04