>> Avoid the brightness drawback, turn the pointers around, paint 
>> directly on the retina.
>>
>> You did ask for twisted.
>
>
> You could sell these as a kit. Alas the box would have to be large 
> enough to hold the supplied white cane and opaque blind man's 
> 'sunglasses' needed for completion.

Laugh all you like, but this is not science fiction...

http://www.hitl.washington.edu/projects/vrd/
http://www.mvis.com/

Obviously, they're probably not using a dollar store laser 
pointer...don't try this at home kids!
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