Well, yes, it is possible to make your eyes blindness when you get hit in your eyes. But that should be the eye injury led by hit. And generally speaking, one basic cause of blindness can be accidents that injure the eye. So it is possible to have blindness because if hit in your eyes. So for your situation, if it is just a small hit, you do not need to worry about it. And if you feel hurt in your eyes, you'd better go and see the eye doctor, and then just have eye exam. By the way, in daily life, just be careful about it.