Well, yes, smoking can lead to optic neuritis. Optic neuritis, which is known as retro-bulbar neuritis, is a leading cause of vision loss. And it can occur acutely in hours to days, or chronically over the course of years. For the causes, it can be caused by a variety of processes leading to inflammation and damage to the optic nerve. And according to some experts, smoking can just increase the risk of getting optic neuritis. And also, injury to the optic nerve caused by trauma, as well as indirect trauma from external force can cause damage and subsequent optic neuritis. So you need to pay more attention to it. Anyway, just give up smoking.