Haha. I have that too, I don't know how to get rid of it but its been there forever, even before my dark eye rings started to become obvious. Sometimes it even itches!! I usually just conceal it with undereye concealer.
I don't think you can do anything about it. It's just the shape of your eye. If you don't like it, you can use the concealor to cover it. Or you can use make up and make use of it for some dramatic eye effects?
I also have this problem....didn't knw what is the cause initially but recently I realized its due to constantly rubbing of the eyes and over the time, it has cause dmy eye area to leave a dark scar.....I'm tiking of going for an eye treatment at Leonard Drake and see if condition will improve. Heard good feedback from the skincare thread about the eye treatments. Will update here after I've finished the treatments (IMG:http://flowerpod.com.sg/forums/style_emoticons/default/biggrin.gif)
i agree with the above post...in fact..to tell ya the truth...i like to make the dark part darker with my eyeshadows to give a more 3 dimensional look to my eyes.....(asian eyes are not as deepset..so need to contour the eyes to make it deepset...contour = shading the outer part of the eye with a colour that's one tone darker than ya skin to create dimension).