Hongrui Jiang
University of Wisconsin - Madison, USA
Title: An accommodative contact lens for presbyopic correction
Biography
Biography: Hongrui Jiang
Abstract
Presbyopia is the most common ocular affliction and presents an extraordinary public health issue. IN this talk I will discuss about a new strategy to correct presbyopia by developing a new type of contact lens called an accommodative contact lens (ACL) that incorporates a tunable liquid lens for accommodation and devices to convert light energy to electricity and store it in situ for the operation. I first demonstrate two types of flexible, variable-focus liquid microlenses: one driven by electrowetting and the other by dielectrophoretic force. Both types of liquid microlenses are fabricated onto soft polymers for ultimate integration and embedment into contact lenses. A tuning range of more than 10 mm in focal length and fast, sub-second tuning speed have been achieved for both types of lenses. I then discuss about light energy harvesting and storage devices that can potentially be integrated into contact lenses, including dye-sensitized solar cells (DSSCs) and micro-supercapacitors. We are especially interested in simultaneously achieving energy harvesting and storage within the same single device structure, so that it can provide steady photocurrent output under sunlight illumination, while part of the photo-generated electrical energy is stored. Lastly, I present a fabrication platform to integrate the accommodative liquid lens, control electronics, and energy harvesting and storage device into the soft contact lens for presbyopic correction.
