There are two parts to Knee Flashers:
The first part is a pair of eyes that are tattooed unto the
participant's knee caps; one eye on each knee. (at this
point you can choose the type, size and colour of eye
you want from human, animal, bird, fish etc)
The second part is a simple eyelash
addition that is
attached to the upper and lower part of those torn knee
exposing gaps which are now so popular in modern jeans
and hipster style trousers.
Once both new features are combined, those sporting
them will be able to wink, flash and generate various
other 'eye expressions' simply by walking about, but
especially when they sit in public places with one leg
coyly crossing the other in such a way as either or both
of the 'knee-eyes' are fully or partly exposed.