[philipswood]

In a blind culture there probably are no guns at all - so your hypothetical sighted-person-amongst-the-blind would need to be able to make his own.

Then again, just throwing rocks might be pretty effective.

[UltraSane]

A slingshot or bow and arrows would be amazingly effective if everyone else was blind.

[wizzwizz4]

And, again, is one person going to develop those? A person with access to elastic rope might invent the slingshot, but I wouldn't expect them to invent the far superior sling: it's not obvious that the sling is better, since the learning curve is steeper. And a slingshot is not a particularly effective weapon: it's an inefficient bow that can't fire arrows.

You're still thinking in terms of "sighted society versus blind society", which is not what we are discussing. (Unless you're thinking "sighted and superintelligent", in which case I'd say sight is probably redundant.)