发明授权
- 专利标题: Extra wide field ophthalmic lens
- 专利标题(中): 超广场眼镜
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申请号: US329712申请日: 1994-10-26
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公开(公告)号: US5623323A公开(公告)日: 1997-04-22
- 发明人: Robert D. Johnson , Janet L. Crossman , Martin A. Mainster
- 申请人: Robert D. Johnson , Janet L. Crossman , Martin A. Mainster
- 申请人地址: WA Bellevue
- 专利权人: Ocular Instruments, Inc.
- 当前专利权人: Ocular Instruments, Inc.
- 当前专利权人地址: WA Bellevue
- 主分类号: A61B3/125
- IPC分类号: A61B3/125 ; A61B3/00 ; G02C7/04
摘要:
A contact-type ophthalmic lens for use in diagnosis and laser surgery has a contact lens (14), an entry lens (16), and an intermediate lens (18). The lenses are aligned along their optical axes. The anterior surface of the contact lens has an aspheric surface with a high power. The intermediate lens is a meniscus lens with a concave posterior surface and a convex anterior surface. Both surfaces of the entry lens are convex and aspheric. This combination of lenses provides a very wide field of view, allowing regions of the eye anterior to the equator to be readily viewed in an aerial image focused in a plane (50) anterior to the lens system.
公开/授权文献
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