Israel’s EyeCan has developed a vibrating headband device that alerts swimmers in real time if they move from the center of their lane or are approaching an obstacle. EyeCan is part of the IDF’s 8200 Impact program and has received a $30,000 grant from the Israel Innovation Authority.
https://nocamels.com/2023/08/smart-headband-gives-blind-swimmers-confidence-in-the-pool/