70‐4: <i>Late‐News Paper:</i> Electronic Contact Lens for Senses beyond Sight

Donora, Matthew; Underwood, Ian

doi:10.1002/sdtp.13094

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…[26] Due to these favourable properties and its flexibility and strength, polyimide has been increasingly commonly used in research towards flexible electronics intended for biomedical use. [27][28][29][30] TPU is also a biocompatible polymer, [31] and can be thermoformed at relatively low temperatures (< 150 °C) to create moulded hemispherical devices which exhibit no buckling behaviour. [22] Adapting this platform to ESCL designs will improve the mechanical and physical properties of the device significantly.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal electrochemical sensing in a smart contact lens

Donora

Quintero

Smet

et al. 2020

Sensors and Actuators B: Chemical

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An electrochemical smart contact lens (ESCL) capable of real-speed spatiotemporal electrochemical sensing across the surface of the eye is demonstrated. Four microelectrode arrays, each comprising 33 gold microdiscs of 30 µm diameter, and a distributed common gold counter electrode, are integrated into a soft smart contact lens platform based on polyimide and thermoplastic polyurethane. Using a novel fast-switching chronoamperometric method, an electrochemical 'video' of concentration variation in a model eye under flow conditions is produced, in which the introduction, progress, mixing and drainage of fluid of varying concentration can be observed. The device builds on previous work towards a platform suitable for clinical use and has proven to be robust under expected use conditions, with sensing performance remaining unchanged after thermoforming and repeated mechanical deformation. This work represents a significant step forward in ESCL design, and constitutes significant progress towards a technology with real clinical utility.

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