how do i stop my roller blind from fraying at the edge?

my roller blind is fraying down the cut edge,is there anything i can do in situ?
maggie, February 2010


done
The reason that it is fraying down one side/edge is because the blind is 'running off'.
Is it a spring powered roller or a chain control?

The BlindGuy, March 2010
gently paint frayed edge with clear nail polish

shaun, February 2010