How can Sasori see?

[I'm stupid real stupid]

Isnt his eyes plastic?

 

[Seventh Sama]

He probably uses chakra or something to "see".

 

[Neji Hyūga2]

I don't think Kishi really thought about that lol. He should be blind, but what ^ mentioned is possible....even though it shouldn't work like that.

 

[Rohan]

Because he has real eyes.

 

[super yang]

his human puppets have real eyes, so even when he switches bodies he has vision

 

[FemmeFatale]

His puppet jutsu was a advanced yamacka jutsu, he just transferred his soul into a puppet permenantly.