Embodiments described herein generally relate to devices and methods for stimulation or recording of accommodation of an eye. Accommodation of an eye naturally occurs through contraction of the ciliary muscle. Embodiments described herein can deliver electrostimulation to the ciliary muscle through a pair of electrodes which deliver power over an area of the sclera which is both positioned above and over an area which is substantially equivalent to the surface area of the ciliary muscle. In further embodiments, electrical impulses produced by the ciliary muscle can be received by one or more electrodes positioned proximate the ciliary muscle. Thus, by embodiments described herein, accommodation of the eye can be reproducibly achieved by external stimulation of the ciliary muscle or measured based on electrical impulses generated by or in conjunction with the ciliary muscle.

A system and method for assessing brain health includes presenting a saccade test to a subject and capturing biological sensor data of the subject in response to the saccade test using a plurality of biological sensors. Saccade cards are employed to measure the brain health of a subject through collection of eye tracking data, for example. Saccade cards using a variety of design elements besides numbers are used for collection of the eye tracking data and other biological data. The captured biological data is used to create a multi-variate signature of the brain health condition of the subject.

A method for providing electrical stimulation to a user as a user performs a set of tasks during a time window, the method comprising: providing an electrical stimulation treatment, characterized by a stimulation parameter and a set of portions, to a brain region of the user in association with the time window; for each task of the set of tasks: receiving a signal stream characterizing a neurological state of the user; from the signal stream, identifying a neurological signature characterizing the neurological state associated with the task; and modulating the electrical stimulation treatment provided to the brain region of the user based upon the neurological signature, wherein modulating comprises delivering a portion of the set of portions of the electrical stimulation treatment to the brain region of the user, while maintaining an aggregate amount of the stimulation parameter of the treatment provided during the time window below a maximum limit.

An adaptive optical objective inspection instrument for optic nerve function comprises: a sub-system for measuring wave aberration of human's eyes, including a near infrared beacon light source, an intermediate optical system, a wavefront corrector and a wavefront sensor, configured to measure and obtain wave aberration of testee's eyes, the intermediate optical system arranged along an optical path between the near infrared beacon light source and the wavefront sensor, and the wavefront corrector arranged in the optical path of the intermediate optical system; a sub-system for correcting wave aberration of human's eyes, including the intermediate optical system, the wavefront corrector and a control unit, the control unit configured to drive and control the wavefront corrector to correct the wave aberration of testee's eyes according to the measured wave aberration; and a sub-system for inspecting optic nerve function, including a visual stimulus display and a system for collecting visual evoked potential signal.

An adaptive optical objective inspection instrument for optic nerve function comprises: a sub-system for measuring wave aberration of human's eyes, including a near infrared beacon light source, an intermediate optical system, a wavefront corrector and a wavefront sensor, configured to measure and obtain wave aberration of testee's eyes, the intermediate optical system arranged along an optical path between the near infrared beacon light source and the wavefront sensor, and the wavefront corrector arranged in the optical path of the intermediate optical system; a sub-system for correcting wave aberration of human's eyes, including the intermediate optical system, the wavefront corrector and a control unit, the control unit configured to drive and control the wavefront corrector to correct the wave aberration of testee's eyes according to the measured wave aberration; and a sub-system for inspecting optic nerve function, including a visual stimulus display and a system for collecting visual evoked potential signal.

Disclosed is a method of correcting distortion of a psychological test using a user's biometric data. By using the method of correcting distortion of a psychological test, it is possible to correct a score of a user who makes response distortion and provide a better selection that meets the objective of the psychological test. Also, it is also possible to train an item with a response instinctually distorted by the user through an analysis of result data of the psychological test training program, thus decreasing the response distortion of the user.

A device for detecting the sleepiness of a driver driving a vehicle is designed to determine if the resetting of threshold values for detection of sleepiness is performed based upon its necessity when an interruption of the driving occurs. The inventive device computes successively an eyelid opening/closing characteristic amount from time intervals between transitions between an opened state and a closed state of an eyelid detected successively; sets threshold values using the eyelid opening/closing characteristic amounts obtained in a predetermined period; and judges the driver feels sleepiness when the eyelid opening/closing characteristic amount deviates from a range defined with the threshold values. In restarting the driving after its interruption, it is judged if the resetting of the threshold values is to be performed based on the driver's condition till then, and the resetting is performed, using eyelid opening/closing characteristic amounts obtained after the restarting of the driving.

A system for electrically stimulating a user comprising: a first housing portion defining an array of openings; an array of permeable bodies with portions exposed through the array of openings and wetted with a solution that facilitates electrical coupling between the system and a body region of the user, wherein each permeable body has a cavity at a proximal portion and a distal portion and is configured to transmit the solution to the body region of the user; a substrate region defining an array of protrusions configured to support the array of permeable bodies and composed of a conductive polymer; and a set of conductors in communication with the substrate region and including a first conductor that provides a first subset of the array of permeable bodies with a first polarity and a second conductor that provides a second subset of the array of permeable bodies with a second polarity.

Disclosed are a biosignal measurement device and a capacitively-coupled active electrode. The capacitively-coupled active electrode includes an electrode face configured to form capacitive coupling with a subject in a non-contact manner to detect a biosignal, and a pre-amplifier disposed on a rear side of the electrode face and embedded in a porous insulator.

A device disclosure includes a unit that measures an eye potential; and a unit that sets a threshold coefficient based on a frequency characteristic value of eye potential differential values and sets an upper threshold and a lower threshold based on a number obtained by multiplying a standard deviation of the eye potential differential values by the threshold coefficient, and detects a change in the eye potential differential values as the eyeblink waveform wherein the change occurs in the time-series data on the eye potential differential values either when the eye potential differential value becomes larger than the upper threshold and, after that, changes from the upper threshold to the lower threshold within a predetermined time or when the eye potential differential value becomes smaller than the lower threshold and, after that, changes from the lower threshold to the upper threshold within the predetermined time.