公开(公告)号：EP0729595A4

公开(公告)日：2002-01-30

申请号：EP95902540

申请日：1994-11-10

申请人： VOLK OPTICAL INC

发明人： VOLK OPTICAL INC

IPC分类号： G02B13/00 ,  A61B3/12 ,  A61B3/125 ,  A61B3/13 ,  G02B13/18 ,  G02C7/04 ,  A61B3/00 ,  A61B3/10

CPC分类号： A61B3/125

摘要： The invention is directed to an ophthalmoscopic or gonioscopic lens system (10) as well as an adapter lens system for use with such an associated lens apparatus. The indirect ophthalmoscopy lens of the invention for use in examination or laser treatment of a patient's eye (16) comprises a hand-held, pre-set or fixed system having at least two lens elements each having first and second surfaces. At least one of the lens elements includes an aspheric surface of revolution. The at least two lens elements are positioned adjacent one another in a housing, such that the refractive properties of each are combined to converge light from an illumination light source to the entrance pupil (18) of the patient's eye to illuminate the fundus (20) thereof and form a fundus image to be viewed. The adapter lens systems of this invention are designed for use with an associated ophthalmoscopic lens, enabling selective modification of the optical characteristics of the ophthalmoscopic lens system in a predetermined manner. Within the scope of this invention, a plurality of attachments make possible change in the net power, optical imaging characteristics, magnification, laser transmission properties or other characteristics of a particular ophthalmoscopic lens.