Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Objective type
Patent
1995-08-22
1996-09-10
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Objective type
351211, 351212, 351247, A61B 310, A61B 300
Patent
active
055550398
ABSTRACT:
An eye measuring apparatus includes a refracting power detector for measuring the refracting power of an eye to be examined, a fogging producer for moving the position of a target image in the direction of the optical axis of the eye to be examined, and a feedback controller for receiving an output from the refracting power detector, and moving the position of the target image in a direction, in which accommodation of the eye to be examined is relaxed, in accordance with refracting power information measured in a predetermined meridian direction of the eye to be examined and astigmatic information of the eye to be examined obtained from refracting power values measured in a plurality of meridian directions of the eye to be examined.
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patent: 4190332 (1980-02-01), Body et al.
patent: 4353625 (1982-10-01), Nohda et al.
patent: 4390255 (1983-05-01), Nohda et al.
patent: 4431278 (1984-02-01), Nohda
patent: 4572628 (1986-02-01), Nohda
patent: 4929076 (1990-05-01), Masuda et al.
Iki Yoichi
Miyake Nobuyki
Ueno Yasunori
Mai Huy
Nikon Corporation
Sikes William L.
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