It is possible to have lazy eyes from serious astigmatism. The so called lazy eye refers diminished vision in one or both eyes, with no any other obvious defects. If one eye has serious vision problem, for example myopia, hyperopia or astigmatism, while the other eye does not, the brain would suppress one eye and the good eye would take all responsibility of vision. Although the people with lazy eye could see as well as other people, but this condition is very noticeable. The two eyes are not pointing at the same direction. I think it is kind of serious, because it is not good looking. If your lazy eye is indeed caused by serious astigmatism, you should go to optometrist to have suitable glasses which can help correct. You can also do some exercises to help increase alignment of the two eyes. Maybe the optometrist or oculist can provide you with some more professional suggestions.