Several attendees at a Trump rally in Tucson, Arizona, experienced severe eye irritation and temporary blindness after sitting on stage behind the former President. The symptoms included burning, watering eyes, and intense pain, leading many to seek emergency medical attention. Doctors speculate the cause could be a faulty stage light emitting strong UV rays or issues with the air conditioning system, though some initially suspected chemical exposure. The Trump campaign is investigating the incident, while the Secret Service confirmed no known threats to Trump were present. Affected individuals reported their condition improved over several days but described the experience as extremely painful and debilitating.