missing and eyeball

I'm at the end of the game. go to the octopus cabinet and there are the eyes
except I am missing the smack dab in the middle eyeball where is it?
I see #24 eyeball in inventory.......I just dont know what i did wrong or how to get the middle one help thanks

The same thing is happening to me. The eyeball in inventory says #24, but when I try to click it, nothing happens. I can't finish the game because this eyeball won't go into the octopus shelf. Does anyone know what to do?

That's not number 24. That's a count. You can't do the puzzle because you're still an eyeball short.