I showered with my contact lenses in for years without thinking twice: the day my eye turned red, an ophthalmologist showed me what was living in my tap water

I showered with my contact lenses in for years without thinking twice: the day my eye turned red, an ophthalmologist showe...

After a decade of showering with contact lenses, one wearer’s eye turned red and weeping. An ophthalmologist’s discovery revealed a dangerous single-celled organism thriving in tap water—and why 85% of lens wearers are unknowingly at risk.