Shingi wanted to improve his Spirit Element as much as he could. With the restriction of the room having none of it and even affecting his skill of controlling mana, the benefits of training here should be better. More challenging, but still better.
He had decided to do the eye surgery in three days, as they promised him everything needed there would be ready. He couldn't delay it as some of the materials would be freshly harvested and had to be used as soon as possible.
No operation like that had ever happened, but he was confident that it would make it possible with the help of Spirit Elements and its improved healing abilities compared to Light Element.
He had to tell Garry about the operation, but they had talked, and he was okay with it. Still, there was always a possibility of Garry changing his mind, but he seemed ready to help in whatever way he could.