Hi all,
well I am both pleased and perplexed that so many of us appear to be suffering from the same ailment.
My 'eye rash' began about 6 months ago in its current form, but I also remember having a sporadic scaly rash on my eyelids for about 6 months 5 years ago which cleared up on its own without any intervention.
In short about 6 months ago I started getting a few red bumps at the corner of my left eye, I suffer from bouts of dermatitis on my hands so stuck a tiny bit of Betnovate on it and it cleared up... or so I thought. Since then it has recurred many times and each time seems to get a little bit worse. I've tried everything I can think of changing, soap, detergents, foods as you all have. I visited the doctor in the hope that a medical practitioner could solve it, but sadly his only solution was to apply hydrocortisone cream - which doesn't work.
As far as make-up is concerned, I think it is one of the least likely perpetrators as the cosmetics industry spend an awful lot of time and money making hypo allergenic & sensitive skin products, so I'm happily ruling that out. (I have tried the make up free thing and although it didn't make it any worse, it also didn't cure it)
What I have tried:
Witch Hazel - tried for 3 days and found that it aggravated the rash
Hydrocortisone - helped to begin with then no effect
Betnovate - some results to begin with now no effect
Baby cradle cap shampoo - aggravated
Aloe Vera - no improvement but calmed the burning
Canasten cream - no effect
Here's a pic I took with me to the doctors in case the rash decided to clear up before my appointment, hope it helps

I wondered whether the rash could be fungal, bacterial, viral or an allergic reaction, but nothing to target each of these has worked so far. If like 5 years ago, it just clears up on its own I will be extatic, but like most of you, I am thoroughly p'd off with it. I hope I can give you some good news soon

Following a hunch and from reading many other peoples homeopathic solution offerings, I am currently trying natural yoghurt. It feels cool and is a welcome relief, but whether it will get rid of the rash, I'll let you know. I keep thinking there has to be a reason, but I can't bleedin' work it out!
Good luck everyone