Patent ID: 11877797
Assignee: AMO DEVELOPMENT, LLC
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A method, comprising:
providing an arrangement comprising:
a first movable stage, wherein the first movable stage is movable under control of the at least one processor with respect to an eye of a subject,
a second movable stage disposed on the first movable stage, wherein the second movable stage is independently movable with respect to the first movable stage and with respect to the eye, under control of the at least one processor,
a fixation target disposed on the second movable stage, and
an optical system disposed in an optical path between the fixation target and the eye, wherein the optical system includes a Stoke cell and projects the fixation target upon the eye;

the at least one processor moving the first movable stage with respect to the eye to a first stage position where the fixation target draws a focus of the eye to near its far point;
stopping movement of the first movable stage with respect to the eye at the first stage position; and
while the first movable stage is stopped, moving the second movable stage with respect to the first movable stage and the eye to a second stage position where the fixation target is moved away from the eye by an additional amount such that blur cues of the fixation target indicate to the subject that the fixation target is moving away from the eye at a same time that a size of an image of the fixation target on a retina of the eye decreases;
measuring a cylinder of the eye;
adjusting the Stokes cell to compensate for the measured cylinder of the eye;
the at least one processor moving the first movable stage again with respect to the eye to the first stage position where the fixation target draws a focus of the eye to near its far point;
again stopping movement of the first movable stage with respect to the eye at the first stage position; and
while the first movable stage is stopped, moving the second movable stage again with respect to the first movable stage and the eye to another second stage position where the fixation target is moved away from the eye by another additional amount such that blur cues of the fixation target indicate to the subject that the fixation target is moving away from the eye at a same time that the size of the image of the fixation target on the retina of the eye decreases;
measuring a refraction of the eye.