Ophthalmic apparatus

Details Ophthalmic apparatus Ophthalmic apparatus

1998-07-01

2000-05-02

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351208, 351211, A61B 302

Patent

active

060564040

ABSTRACT:
An ophthalmic apparatus for examining or measuring an eye to be examined, having an alignment optical system for aligning a position of the eye and that of a measuring system so as to be the predetermined positional relationship therebetween, the apparatus comprising a projecting device having a light source for projecting a pencil onto an examinee's face, a photo-receiving device which is an optical system having a positional detector for receiving reflex caused by the projecting device, the photo-receiving device having a detecting area which includes a right boundary of the examinee's face under the condition of being aligned with a right eye and a left boundary of the examinee's face under the condition of being aligned with a left eye, and a judging device for judging whether the eye is a right eye or a left eye in a manner of judging whether a face's boundary is the right boundary or the left boundary based on results detected by the photo-receiving device.

REFERENCES:
patent: 5463430 (1995-10-01), Isogai et al.
patent: 5561482 (1996-10-01), Miyake
patent: 5737058 (1998-04-01), Umemura et al.
patent: 5856861 (1999-01-01), Hosoi et al.

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