Well, no, smoking can not lead to eye cancer. But smoking too much can cause a lot of eye diseases. So you should quit smoking. For example, when you smoke, it will make bilirubin, which is a byproduct of old red blood cells, can not be filtered by the liver as efficiently. So in this way, you have increased blood flow to the eyes, and even mild jaundice. Finally, you'll get yellow eyes. Besides, by smoking, it can also lead to dark circles, eye bags and the lazy eyes. In some cases, it can lead to the long term effects, such as hearing loss, and the lung problem. And also, it can degrade the night vision. So it can be kind of dangerous. Anyway, it is kind of risk that your eyes have diseases. To avoid them, the only thing you should do is to quit smoking.