Ophthalmologic viewing apparatus

Details Ophthalmologic viewing apparatus Ophthalmologic viewing apparatus

1997-09-17

1999-06-22

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 310

Patent

active

059147717

ABSTRACT:
An ophthalmologic viewing apparatus 1 has a viewing system 23 for viewing the forward eye sections (5, 7, 9) and has an illuminating system 13. The illuminating beam of the illuminating system 13 impinges from the outside on the cornea 5. The viewing apparatus 1 has a light absorber 25 for suppressing the virtual image of the illuminating light source 17, namely, the so-called corneal reflection. The light absorber 25 is in the region of the optical axis 11 of the illuminating system 13 and has dimensions which are small compared to the transverse dimensions of the illuminating beam. The virtual image is formed by the reflection at the convex surface of the cornea 5.

REFERENCES:
patent: 3259041 (1966-07-01), Okajima
patent: 4704018 (1987-11-01), Takhashi
patent: 4715704 (1987-12-01), Biber et al.
patent: 4795250 (1989-01-01), Nakamura et al.
patent: 4998810 (1991-03-01), Sander et al.
patent: 5126877 (1992-06-01), Biber
patent: 5555040 (1996-09-01), Kaneko

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