I don't use soy in anything, including food consumption. (That's just a personal preference because most soy is not on the GRAS list -- it's a non-food unless fermented.) I'm sure it would be okay to use soy lecithin in your recipe though, since 3% is the max used in any formulation. Sorry, I can't give you my formula for the eye cream, but you can make one up by starting with the basics of how some body butters are made (no wax) and make your adjustments to get the consistency you desire. Select non-clogging butters and oils with anti-aging properties. If you decide to try it, I'd be happy to give you some tips if you run into trouble or have questions.