Sweetie, I suggest you to buy a pair of prescription glasses according to your prescription. They can help correct your vision problems. Or you can consult an eye doctor to ask some ways to treat with your lazy eye. There are many kids who have a lazy eye but they can still doing well because they can see their lessons clearly. So you don't need to worry about this as long as the other eye can work well.
Maybe your vision problems will affect your study if the other eye can't see the blackboard clearly. But you can wear a pair of glasses to help solve your problems. I know many people who have vision problems can perform well in school. So I think if you pay enough attention to your academic, you can learn it well.