Actor Song Il Gook, who stars in the popular KBS 2 TV entertainment program 'Superman Returns,' might lose his vision due to glaucoma.

On the latest episode of the KBS 2 TV entertainment program 'Superman Returns' which aired on Sunday, Song Il Gook took the triplets Dae Han, Min Gook, and Man Sae to see an ophthalmologist for general checkup, and found out that he has glaucoma. After having his triplets see the doctor, he decided to check up on his eyes as well. After the exams, he was diagnosed glaucoma and got shocked at the news that he might lose his vision in the near future.

The ophthalmologist said, "80% of the optic nerve already seems to be wounded. You might lose your entire vision in five to ten years if you do not start treatment now." In related news, the KBS 2 TV entertainment program 'Superman Returns' tells a story of celebrities and their children. Actor Song Il Gook and his triplets Dae Han, Min Gook, and Man Sae, MMA fighter Choo Sung Hoon and Japanese top model Yano Shiho's daughter Choo Sarang, singer Tablo of Epik High and actress Kang Hye Jung's daughter Haru, and comedian Lee Hwi Jae and his twin sons star in the show. The KBS 2 TV entertainment program 'Superman Returns' airs every Sunday night.