They can't touch. There is bone formation between them.
The eye balls are placed in the bony sockets and that is not possible, normally.
bam
When two pieces of metal touch in space, they become PERMANENTLY stuck together. This happens because of the lack of gravity in space
You can see pretty excellent if you have 99 eyeballs and 1 eyebrow you look pretty good and you get a better sight seeing and look pretty good
You grow an extra limb or two.
For the fact, if two pieces of dark matter touch it will cause a reaction and the pieces will fade, taking others with it.
if you touch a snake nothing happens
Barring accidents, generally two. Unless you count its browneye...two.
they have 2 eyeballs.
eyeballs are soft
No it's impossible to have hair on your eyeballs
You might want to call an electrician... nothing usually happens when you touch two hots together.