My glasses ____ ____ I was like a blind man,fell to the ground and broke.

问题描述:

My glasses ____ ____ I was like a blind man,fell to the ground and broke.
答案是without which
我想知道which是哪个关系代词的先行词,从句又是哪一句?

without which I was like a blind man为定语从句,修饰先行词glass