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However, maintaining a secure communications connection and a self\u2010sustainable power source are still looming challenges. Herein, a proof\u2010of\u2010concept electronic contact lens is demonstrated that includes a spiral antenna with its wireless circuit unit for data telemetry, a rectifier circuit for power conditioning, and a micro\u2010light\u2010emitting diode (\u03bcLED) as a load. The spiral antenna with its rectifying circuit is designed considering operation in the industrial, scientific, and medical (ISM) band of 2.4\u2009GHz. The spiral coil with an inner diameter of 10\u2009mm, an outer diameter of 12\u2009mm, and a wire width of 0.2\u2009mm is fabricated on a donut\u2010shaped flexible polyimide substrate. For biocompatibility purposes, polyimide is used as the contact lens substrate and polydimethylsiloxane (PDMS) is used for encapsulation. A 3D\u2010printed eye model is developed for accurately shaping the curvature of the PDMS\u2010encapsulated contact lens. The reflection coefficient (<jats:italic>S<\/jats:italic><jats:sub>11<\/jats:sub>) of the fabricated antenna is tested in different conditions and on an eye model to mimic the liquid condition of the human eye. In a wide range of conditions, a minimum of \u221220\u2009dB reflection coefficient (<jats:italic>S<\/jats:italic><jats:sub>11<\/jats:sub>) is obtained.<\/jats:p><\/jats:sec>","DOI":"10.1002\/aisy.201900190","type":"journal-article","created":{"date-parts":[[2020,2,12]],"date-time":"2020-02-12T05:13:41Z","timestamp":1581484421000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":64,"title":["Electronic Contact Lens: A Platform for Wireless Health Monitoring Applications"],"prefix":"10.1002","volume":"2","author":[{"given":"Mengyao","family":"Yuan","sequence":"first","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rupam","family":"Das","sequence":"additional","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rami","family":"Ghannam","sequence":"additional","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yinhao","family":"Wang","sequence":"additional","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julien","family":"Reboud","sequence":"additional","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roland","family":"Fromme","sequence":"additional","affiliation":[{"name":"Chemical Engineering W\u00f6hlk Contactlinsen GmbH  D-24232 Sch\u00f6nkirchen Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Farshad","family":"Moradi","sequence":"additional","affiliation":[{"name":"Department of Engineering Aarhus University  8200 Aarhus Denmark"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8412-8164","authenticated-orcid":false,"given":"Hadi","family":"Heidari","sequence":"additional","affiliation":[{"name":"James Watt School of Engineering University of Glasgow  Glasgow G12 8QQ UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,2,28]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/MAP.2018.2859200"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms14997"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.aap9841"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/978-981-13-0950-2_9"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1109\/JMEMS.2019.2927232"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/admt.201800671"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.7b03180"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1021\/acsnano.7b00370"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.3390\/s19092062"},{"key":"e_1_2_9_11_1","unstructured":"D. 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