When sperm accidentally enters the eye, it easily stimulates the conjunctiva of the eye and causes the blood vessels to dilate, so it manifests as redness of the eye. The symptoms of red eyes will only gradually improve after corresponding treatment with anti-inflammatory drugs, such as treatment with oxyfloxacin eye drops. Some patients may cause eye discomfort and rub their eyes vigorously with their hands causing rupture of small blood vessels on the eye surface and the appearance of subconjunctival hemorrhagic spots, which may also manifest as eye redness. Therefore, after the sperm enters the eye, it is best to rush to flush the conjunctival sac with saline, which can reduce the irritation to the eye surface tissue and prevent secondary bacterial infection.