I am almost 61 and have a itchy, discolored eyelid Dr says eczema, am I not too old to develop this

I have a puple/brown rash on one eyelid. It itches. Saw a Dr after someone suggested it may be heliotrope rash. He said no, eczema, but I read eczema rarely develops past age 20 and I'm way past that. I used topical steroid cream for a week and it cleared up the itch and redness but not the discoloration. I quit using it for 5 or 6 days and the redness is back, not itching yet but feels swollen. Could it be eczema or something else? Thanks. It was a dermatologist I saw.

I am 59 and in August was diagnosed with contact dermatitis (eczema of a kind) on my eyelids. I’ve now had it for about 6 months - used various steroids & the latest is protopic, an immunosuppressant, but not a steroid.  So I guess it can happen in our age bracket  - could you be allergic to something? I have not worked out to what I am supposed to be allergic. 

I do think it was an allergy to the cream I was using for acne.