FAILSAFE OPERATION OF EYE-MOUNTABLE DEVICE Russian patent published in 2018 - IPC G02C7/04 

FIELD: optics.

SUBSTANCE: invention relates to optics and, in particular, but not exclusively, to eye-mountable devices that include contact lenses. Claimed eye-mountable device comprises an optical lens; an accommodation actuator to provide vision accommodation for the optical lens; a controller including an accommodation logic to select one of a plurality of vision accommodation states for the device. Plurality of vision accommodation states includes at least a failsafe focal distance. Device also includes a failsafe subsystem including one or more detectors to monitor a fault condition in the operation of an eye-mountable device. Failsafe subsystem includes logic means which, when executed by the failsafe subsystem, cause the eye-mountable device to perform operations that include: monitoring one or more operational indicators of the eye-mountable device by at least one of said one or more detectors, detection of a fault condition as a response to the fact that said one or more operational indicators are outside the acceptable range, and in response to the detection of a fault condition, transitioning the eye-mountable device into a failsafe mode, wherein the failsafe mode includes setting the actuator of accommodation to a failsafe corresponding focal length.

EFFECT: disclosed devices can help people to compensate for the consequences of presbyopia.

21 cl, 4 dwg