Patent ID: 11896306
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 linearly under control of the at least one processor with respect to an eye of a subject,
a second movable stage directly mounted on top of the first movable stage, wherein the second movable stage is independently movable linearly with respect to the first movable stage and with respect to the eye in a direction parallel to a linear movement direction of the first movable stage, 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 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 in the direction parallel to the linear movement direction of the first movable stage 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.