×

Electronic ophthalmic lens with eye closed sensor with open eye prompt and data logging

  • US 10,101,581 B2
  • Filed: 07/28/2015
  • Issued: 10/16/2018
  • Est. Priority Date: 07/28/2015
  • Status: Active Grant
First Claim
Patent Images

1. A powered ophthalmic lens, the powered ophthalmic lens comprising:

  • a contact lens;

    a power source incorporated into the contact lens;

    an eyelid position sensor system incorporated into the contact lens, the eyelid position sensor system including a sensor array having a plurality of individual sensors vertically spaced from each other to detect eyelid position;

    an accelerometer incorporated into the contact lens for determining head movement;

    a rear facing pressure sensor incorporated into the contact lens configured to determine when the contact lens is on eye;

    a pupil position system having at least one accelerometer for tracking eye movement;

    a system controller configured to sample each individual sensor in the sensor array to detect eyelid position, the accelerometer to detect head movement and the rear facing pressure sensor to detect when the contact lens is on eye, and provide an output control signal, the system controller, the eyelid position sensor system, the accelerometer, the rear facing pressure sensor and the pupil position sensor being configured to determine at least one of whether the contact lens is on eye, tracking length of blink period width and eyelid open period width, level of eyelid droop, eyelid speed, saccades movement of the pupil, or head droop in combination with longer blink period width, the output control signal being indicative of wakefulness;

    at least one alert mechanism configured to receive the output control signal and capable of at least one of providing an alert and storing data in response to a determination by the system controller that the eyelid has been closed for a period of time, a level of eyelid droop, eyelid speed, saccades movement of the pupil, or head droop in combination with longer blink period width indicative of at least one of onset of sleep and drowsiness; and

    a memory preservation controller for testing the power source, at a predetermined frequency, to determine a level of energy that remains, wherein if the energy falls below a predetermined threshold, the memory preservation controller sends an instruction to the system controller to no longer sample the eyelid position sensor system and pupil position system and preserve all data collected.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×