Responses
The doll hit his glasses with a sword so it cracked so it might got some glass shards on his eyes(=・ω・=)
Basically he jumped, facing his sword on the glasses, which made him to break some of the lense.
How did he hit the eye if he had glasses?.... Why am i even questioning little things when the whole manga is questionable....
AND IM STILL READING IT HAHAHAHAHAHAHAHAH