Title:
【発明の名称】間接検眼鏡検査レンズ・システム及びアダプタ・レンズ
Document Type and Number:
Japanese Patent JPH09505221
Kind Code:
A
Abstract:
The invention is directed to an ophthalmoscopic or gonioscopic lens system as well as an adapter lens systems 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 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 of the patient's eye to illuminate the fundus 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.
Inventors:
Volk, Danald, A
Application Number:
JP51453495A
Publication Date:
May 27, 1997
Filing Date:
November 10, 1994
Export Citation:
Assignee:
Volk, Danald, A
International Classes:
A61B3/12; A61B3/125; A61B3/13; G02B13/18; G02B13/00; (IPC1-7): A61B3/13; A61B3/12; G02B13/00; G02B13/18
Attorney, Agent or Firm:
Sanada Yuzo (2 outside)