Ophthalmic apparatus for photographing the anterior part of the

Details Ophthalmic apparatus for photographing the anterior part of the Ophthalmic apparatus for photographing the anterior part of the

1993-06-11

1994-09-13

Gellner, Michael L.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351208, 351211, 351214, 351221, A61B 314, G03B 2900

Patent

active

053473310

ABSTRACT:
Ophthalmic photographing apparatus for photographing an anterior part of examinee's eye provides an alignment optical system including a reflection image forming device for forming an image reflected on the cornea of the examinee's eye, an observation optical system for observing image of the anterior part of the examinee's eye, comprising an alignment reticle, and a photographing optical system for photographing the anterior part of the examinee's eye. The picture image data of the anterior part of the eye photographed with the photographing optical system is memorized by a picture image data memory, and an alignment deviation is detected by operating the memorized picture image signal to detect a designated part and by finding a dislocation distance of the designated part from a reference position, and an analyzing position of the image is corrected on the basis of the alignment deviation and the picture image of the anterior eye is analyzed.

REFERENCES:
patent: 5159361 (1992-10-01), Cambier et al.
patent: 5202708 (1993-04-01), Sasaki et al.
U.S. patent application Ser. No. 07/901,984, Isogai et al, filed on Jun. 22, 1992.

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