University of Waterloo 3D-Prints Custom Contact Lenses in 20 Minutes

Most contact lens wearers have been there: the back-and-forth with the optometrist, the trial lenses that almost fit, the weeks of waiting for a custom order to arrive. A team at the University of Waterloo thinks there is a faster way.

Researchers in the Department of Chemistry developed a digital manufacturing platform that uses advanced 3D printing to fabricate contact lenses customized to a patient's exact corneal shape. The process takes as little as 20 minutes from scan to finished lens.

Why current lenses fall short

Standard contact lenses are mass-produced in a limited range of base curves and diameters. For patients with irregularly shaped corneas, that one-size-fits-some approach does not work. These patients need rigid gas-permeable lenses, and finding the right fit traditionally requires multiple office visits over weeks or even months.

The Waterloo team, led by research associate Dr. Sayan Ganguly, built a software pipeline that designs each lens from scratch. The inner surface is shaped to precisely match the patient's cornea. The outer surface carries the prescription. The two surfaces are printed together in a single process, eliminating the alignment problems that plague older manufacturing methods.

A new silicone formulation

Conventional silicone materials are not always compatible with additive manufacturing processes. That gap is what blocked 3D-printed contact lenses from reaching the clinic. The Waterloo team formulated a new hydrophilic silicone compound designed specifically for 3D printing.

The material is biocompatible and highly oxygen-permeable, two non-negotiable properties for anything that sits on the eye all day. The researchers also developed an ultra-thin, non-contact coating process that smooths the lens surface without altering its optical shape or custom dimensions.

What the research shows

After positive laboratory testing, the team is moving toward in vivo studies. They filed a provisional patent for the hydrophilic silicone formulation. The project won a gold medal at the 2026 Shanghai International Exhibition of Inventions.

The researchers are working with the Centre for Vision and Eye Research to advance the technology toward commercialization. If the platform clears clinical trials, it could shrink contact lens fitting from a months-long process into a single visit.

The research was published in the journal Acta Biomaterialia and documented by the University of Waterloo in July 2026.