SOMETHING to file down an eyechip with (dremel, sandpaper, file)
Aren't they pretty? Blythe chips have a lot more depth than your standard pullip chips. Unfortunately, Blythe eye holes are 14mm wide and Pullip eye holes are 12mm wide. To fit, you must either enlarge the Pullip eye holes by carving the socketor make the blythe chips smaller by getting rid of 1mm around the edge.
First, prep your eye mechanism by removing the lenses already in there (See this tutorial). I have done both, and it is a lot easier to file the chips down. If you don't get the eye holes right, you will have a cross eyed or lazy-eyed doll. And the nice thing about blythe chips is that there is a clear rim around the textured part of the chip that is EXACTLY 1mm all around, so all you need to do is to remove the clear part and you have a chip that fits! The dark green chip above has been filed so that its rim is gone.
How do you file it down? I use a dremel. It's fast, but it's also expensive. If you don't have other uses for powertools, you can get a craft dremel for about $20 that will also do the trick. Because dremels are high powered, if you don't have very steady hands, a little twitch could take a gouge out of your chips.
You can also use a file or coarse sandpaper. This will take a while, but it will also give you better control. Wet sanding works faster than dry sanding.
Depending on the chips you use, the chip may still poke out a bit on the eye, about 1/2mm. If you want to get rid of that, you can file the chips at an angle so that the back side of the chip is slightly smaller than the front side. To set the chip, put a light coating of glue around the rim of the chip before you put it into the eye socket.
There's lots of things you can do to pretty up your blythe chip. You can put foil on the back, glitter, paint, paper, or even marker.
Brainworm has a tutorial on how to use black rings or rims to enhance pale chips here