interesting with venus, from my understanding the more magnification you punch at it the dimmer it gets, a 6" is definately not bright enough to "hurt your eyes", ive shown heaps of people including my 6yo son venus with my 10" f4.7 newt which caputures a bucketload of light. your eyes must be super super sensitive.
On the up side,
you shouldn't have problems viewing the flame nebula or something like that