[rini17]

Who makes you unable to help yourself? Say, one watt delivered onto the retina can do damage very quickly. One AA battery can easily supply that.

[anfractuosity]

Sorry I wasn't thinking about a system capable of blinding people, those do definitely exist though. Also there are devices such as 'dazzlers' which are intended to cause non-permanent damage.

[dhimes]

Yeah, we were talking about something really fun, like being able to melt a boulder or something. %^)