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Updated: Feb 5, 2026
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Development of an In Vitro Ocular Platform to Test Contact Lenses
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Spatial-chromatic encoding cosmetic contact lenses for enhanced natural eye tracking
Hengtian Zhu1, Heyu Huang1, Huan Yang1
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China.
Nature Communications
|February 3, 2026
Summary
New cosmetic contact lenses enhance eye tracking by using spatial-chromatic encoding. This method improves accuracy and robustness in natural environments, overcoming limitations of traditional vision-based eye tracking.
Area of Science:
- Biomedical Engineering
- Computer Vision
- Ophthalmology
Background:
- Traditional vision-based eye tracking struggles with illumination, occlusion, and individual variations.
- This leads to low recognition rates and reduced tracking accuracy in real-world scenarios.
Purpose of the Study:
- To develop enhanced cosmetic contact lenses for accurate and robust eye movement feature tracking.
- To overcome the limitations of current vision-based eye tracking methods.
Main Methods:
- Implementation of a spatial-chromatic encoding strategy within cosmetic contact lenses.
- Integration with a head-mounted eye tracker and RGB cameras for gaze tracking.
- Testing under challenging illumination and off-axis camera placements.
Main Results:
- Achieved a 93% feature recognition rate under challenging illumination, outperforming pupil recognition.
- Demonstrated superior accuracy (<1°) in eye movement modeling and human eye tracking.
- Showcased robust performance with highly off-axis camera placement.
Conclusions:
- Eye movement feature enhanced cosmetic contact lenses offer a lightweight and unobtrusive solution for eye tracking.
- This technology significantly improves gaze tracking accuracy and robustness in natural environments.
- Facilitates broader application of gaze-based interaction in diverse real-world settings.
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