New Silicone Enables 3D Printed Custom Contact Lenses in 20 Minutes
Researchers have developed a novel hydrophilic silicone and a digital manufacturing system capable of producing custom-fit contact lenses in approximately 20 minutes, potentially revolutionizing the fitting process.
A team at the University of Waterloo has created a digital manufacturing system that can print custom contact lenses in about 20 minutes. This breakthrough pairs a newly developed silicone material with additive manufacturing, aiming to allow patients to be measured, have a lens designed, and receive a wearable product within a single clinic visit.
The current process for fitting contact lenses, particularly for individuals with irregularly shaped corneas requiring rigid lenses, often involves multiple appointments over weeks or months. The Waterloo platform, developed within the university's Department of Chemistry, is designed to significantly shorten this timeline. It integrates specialized software for lens design, a novel silicone formulation suitable for 3D printing, and the necessary printing and finishing steps.
Dr. Shirley Tang, a professor in Waterloo's Department of Chemistry, highlighted the potential for truly personalized contact lenses with this technology, stating that it produces lenses with patient-specific surfaces for precise fit, optical clarity, and expected mechanical performance. The researchers addressed a key challenge: standard silicones are not easily adapted to additive manufacturing. Their solution involves a new water-friendly silicone recipe tailored for printing while retaining essential lens characteristics.
The design software creates lenses with an inner surface that precisely matches a patient's cornea and an outer surface for vision correction. To overcome the inherent "stair-step" ridges common in layer-by-layer manufacturing, an ultra-thin, non-contact coating step is employed to smooth the surface without compromising the lens's geometry or optical qualities. Preliminary lab tests confirm the lenses are biocompatible, and the team is preparing for in-vivo trials. A provisional patent has been filed for the hydrophilic silicone, with a full application forthcoming.
This development represents a significant step towards on-demand, personalized medical devices. By enabling rapid, custom fabrication of contact lenses, it shifts manufacturing closer to the patient. This approach, leveraging specialized materials and additive processes, aligns with the broader trend of decentralized production in additive manufacturing, potentially reducing lead times and improving patient outcomes, particularly for specialized lens requirements.
Edited by the news editor with AI from the original report — please refer to the original source.