Blind people and fortune telling

When I was a child, there was a fortune teller who lived nearby. This is very effective, but it is not surprising that he was born blind. However, he has a son who tells fortune with him. Unexpectedly, his eyes gradually went blind, which is very strange.

One view is cost, which is related to the accuracy of fortune telling. It is said that revealing secrets will lead to loss of life or other losses.

There is also a saying that it is related to the method of fortune telling, which leads to blindness.