I Need To Replace The Air Ducts In My House.

I need to replace the air ducts in my house. They are full of mold and mildew and you can really tell when the unit has been off. I was considering having the air ducts treated but since they are so old, well over 25 years old, I figure I should just have them replaced. That said, my eyes have been bothering me and I think it is the air in this house. A week or so ago it felt like I had sties in both eyes and my left eye was swollen underneath and so was my under eyelid. And the eyelid was red. I have redness on both lower eyelids. I figure it is bacteria also and so I've used a bit of 70% rubbing alcohol to zap the redness and the bacteria. Mostly my eye is closed but when I open my eye a bit of alcohol gets in my eyes. I'm just concerned about the house funk getting in my eyes. I guess optimally an antibiotic eye drop would be the best idea, but then I'd have to go to the doctor's office.