Ophthalmic apparatus

Details Ophthalmic apparatus Ophthalmic apparatus

1999-08-20

2000-07-04

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

A61B 314

Patent

active

060828609

ABSTRACT:
An ophthalmic apparatus having a main unit detects the alignment of the main unit with the subject's eye with respect to vertical and lateral directions by an XY-alignment detecting means on the basis of an index light beam projected on the eye and reflected from the cornea of the eye, detects the alignment of the main unit with the eye with respect to horizontal directions parallel to the optical axis of the eye by a Z-alignment detecting means on the basis of a Z-alignment index light beam projected obliquely on the eye and reflected from the cornea of the eye, and permits a display means to display the results of detection made by the Z-alignment detecting by a display permitting means when a predetermined condition is satisfied.

REFERENCES:
patent: 5988815 (1999-11-01), Maus et al.
patent: 5997529 (1999-11-01), Tang et al.

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