Ultra-fast lenses

Smart glasses promise to protect people who suffer from photosensitive epilepsy thanks to a surprisingly fast technology. The system is based on optical sensors integrated into the frame that constantly analyze the surrounding light spectrum, detecting flashing frequencies between 3 and 60 Hz, the most dangerous range for epileptics. When the sensors identify critical patterns, a microprocessor instantly activates the liquid crystal display (LCD) lenses. In just 20 milliseconds the lenses switch from transparent to darkened, blocking up to 95% of the incoming light. Reaction time is crucial: a photosensitive seizure can be triggered within 100–150 milliseconds of continuous exposure. The device uses recognition algorithms that distinguish natural light from dangerous artificial stimuli, avoiding false positives. For now, it is a prototype; further studies are needed to validate its effectiveness and optimize sensitivity and response speed, but it is certainly good news for people who suffer from epilepsy.

Stefano Ravizza
NP November 2025