The causes of black smoke in the eyes include retinal hemorrhage, vitreous hemorrhage or visual abnormalities. 1. Retinal hemorrhage: diabetic retinopathy, retinal branch vein embolism, etc. can cause retinal hemorrhage, and the blood will block the light, forming a black shadow on the retina, like black smoke. 2. Vitreous hemorrhage: trauma, fundus neovascularization can lead to vitreous hemorrhage, the blood may spread in the vitreous cavity, forming a smoky shadow, giving people a feeling of black smoke in the eyes. 3. Visual abnormalities: mainly caused by neurological lesions, the patient’s symptoms may be manifested as black smoke in the eyes, hallucinations or flashing sensations. There are many other causes of black smoke in the eyes, and it is recommended that patients go to the hospital in time to clarify the cause of the disease and then give targeted treatment.