There are many reasons why there are black dots in the eyes, such as vitreous clouding and conjunctival nevus. 1. Vitreous clouding: the vitreous body of many people’s eyes can become cloudy due to developmental factors, and the spots after the vitreous clouding will be projected onto the human retina, thus causing black dots inside the eyes. 2. Conjunctival nevus: Conjunctival nevus can also cause black dots in the eyes, in fact, is the phenomenon of pigmentation in the white eyeballs, thus causing the symptoms. There are many reasons for black dots in the eyes, and it is advisable to consult a doctor in time to take standardized treatments and pay attention to them after symptoms appear.