Recently I read about an eyeliner pen that had a kind of flat forked tip iyswim.
It was designed so that you could colour in between your lashes on the lashline.
It cost about £18. I think it was kind of an inky one rather than a kohl one.
I am too skint to consider buying it atm but we have an amazon dot com voucher which needs using (sis in US sent it by mistake for DS and now I have to buy something small with it that sis can post to me
).
I though I had put the liner in my Amazon wishlist for a rainy day but it's not there 
Anyway I'm sure you lot will know what I'm rattling on about...can you help? It might have been Sally whatsit on the Guardian website if it wasn't here that people were talking about it.