Smart Eyeglasses: A Valid and Reliable Device to Assess Spatiotemporal Parameters during Gait

Abstract

The study aims to determine the validity and reproducibility of step duration and step length parameters measured during walking in healthy participants using an accelerometer embedded in smart eyeglasses. Twenty young volunteers participated in two identical sessions comprising a 30 s gait assessment performed at three different treadmill speeds under two conditions (i.e., with and without a cervical collar). Spatiotemporal parameters (i.e., step duration and step length normalized by the lower limb length) were obtained with both the accelerometer embedded in smart eyeglasses and an optoelectronic system. The relative intra- and inter-session reliability of step duration and step length computed from the vertical acceleration data were excellent for all experimental conditions. An excellent absolute reliability was observed for the eyeglasses for all conditions and concurrent validity between systems was observed. An accelerometer incorporated in smart eyeglasses is accurate to measure step duration and step length during gait.

A Clustering-Based Approach to Functional and Biomechanical Parameters Recorded with a Pair of Smart Eyeglasses in Older Adults in Order to Determine Physical Performance Groups

“…During the 6MWT, participants had to cover the greatest possible distance in 6 min, without running, in a 10 m shuttle. Besides the total distance obtained from the number of shuttles performed [ 18 ], two previously validated spatiotemporal parameters were collected with the smart eyeglasses [ 36 ]. During offline analysis, step duration was first calculated from each step, represented by the temporal difference between two consecutive maximal vertical acceleration peaks recorded by the smart eyeglasses’ IMU.…”

“…Although most of the studies placed the IMUs close to the body’s center of mass or at the wrist [ 32 ], some studies have suggested that head-level placement improves movement accuracy for fall detection compared to wrist [ 33 ] or hip and trunk [ 34 ] placements. In this context, connected smart eyeglasses have been developed and validated to monitor Sit-to-Stand movements and spatiotemporal parameters during walking in healthy young participants [ 35 , 36 ]. However, to date, smart eyeglasses embedding an IMU have not been used to assess the functional physical capacities of older adults.…”

Wearable Devices for Gait Measurement - A Case for Textile-Based Devices

“…The so-called smart glasses or smart spectacles describe a type of head-don display technology that functions as a computer and aids users to access information within their visual field of view in realtime [35]. According to Hellec et al, most elderly people wear glasses during daily living activities, embedding an IMU in such a wearable device of daily utility could portend a technological innovation for gait analysis [36].…”

Detection of low expression of molecular subtype HER2 in breast cancer using ultrasound-based radiomics

“…Both sonographers were unaware of the histopathology results. The intra-and interobserver concordance was assessed using the interclass correlation coe cients (ICCs), and ICCs greater than 0.75 indicated good stability of the features (Hellec et al 2022).…”