Explaining on Instagram: "At Rotterdam Zoo in the Netherlands, a gorilla named Bokito made headlines in 2007 after escaping his enclosure and attacking a visitor who had often made direct eye contact with him, something gorillas see as a threat. To prevent similar incidents, the zoo partnered with an insurance company to hand out cardboard “Bokito Viewer” glasses. These quirky glasses had printed eyes that looked sideways, allowing visitors to watch the gorillas without appearing to stare direct