그의 어머니가 나이 40세 되던 해 우연히 안질을 얻어 갖은 노력을 다 했으나 10년 만에 불행하게도 실명하고 말았다.
When his mother was 40 years old, she accidentally went through eye diseases, so he tried to cure her eyes, but unfortunately she went blind after 10 years.