It could be harmless and could be a sign of liver disease. I would go for a liver function test. That's just me.
You need an evaluation by an M.D.
Welcome to the Senior Health Forum. I am glad that you found us and took the time to post.....but sorry about your eye-lid problem.
I am far from an expert but I did some reading and found a sin condition, eye-lid related called Xanthelasma. It is described as a raised yellow patches on your eyelid(s). They can appear due to age. They are harmless but on occasion they can be indicative of high cholesterol.
Please don't take my word for it. There are certainly other possibilities. Our eyes are precious and problems with or near them should not be ignored! I hope you will let us know how you are doing. I'll look forward to hearing from you.
Best of Luck and Take Care,