A man from Shenzhen, China, identified as Wu, lost his left eye after swatting a drain fly that landed on his face, leading to a severe infection. Initially diagnosed with seasonal conjunctivitis, Wu's condition deteriorated rapidly, resulting in redness, swelling, and extreme pain in his left eye. Despite medical treatment, the infection spread, prompting doctors to remove his eyeball to prevent it from reaching his brain. The drain fly, known for inhabiting damp areas like bathrooms and kitchens, is a carrier of germs. This incident has sparked discussions on social media about hygiene and insect-related health risks, with users expressing fear and advising caution when encountering such insects. Wu's case is reminiscent of a previous incident in 2018 involving a 97-year-old woman who suffered from a similar infection after a fly landed on her wound.