Bailey, J, Clamp, J, Farmer, S et al. (5 more authors) (2022) Infrared triggered smart contact lens for the treatment of presbyopia. Journal of Physics D: Applied Physics. ISSN 0022-3727
Abstract
A switchable contact lens prototype was fabricated and tested with integrated off the shelf electronic components to drive a liquid crystal active lens element. This prototype was capable of changing its focal power by an average of +1.9D, but a maximum of +3.2 ± 0.2D was also measured. Switchable focus contact lenses are intended to help restore functional near and intermediate vision accommodation to those suffering from presbyopia, an inevitable age-related eye condition. The custom PMMA contact lens substrates used in this prototype are equivalent to commercially available scleral contact lenses. It was discovered that more careful design considerations are needed when at least one of the substrates is <100µm thick (which is needed for a final device). Without these design considerations, the switchable focal power of the lens is susceptible to change as the liquid crystal insert layer is able to flex. The prototype has an on-board electronics platform which was self-powered with a battery. Illuminating the electronics package with a 600Hz infrared signal switched the device on, which passed an AC voltage to the electrodes of the contact lens, reorientating the director of the liquid crystal with an electric field. To our knowledge, this is the first demonstration of a battery powered and wirelessly triggered smart contact lens for the treatment of presbyopia.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This item is protected by copyright. This is an author produced version of an article published in Journal of Physics D: Applied Physics. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Soft Matter Physics (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/K503836/1 EPSRC (Engineering and Physical Sciences Research Council) EP/S029214/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 11 Feb 2022 13:35 |
Last Modified: | 08 Feb 2023 01:13 |
Status: | Published online |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1361-6463/ac52cc |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:183420 |
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Filename: Bailey et al JPhysD-Smart switchable contact lens Accepted.pdf
Licence: CC-BY-NC-ND 3.0