I found some Comfrey products when I asked Google if there were "Comfrey eye drops" though I didn't find much on Plantain, Plantago. I would be very interested hearing if folks used Plantain as I have a lot of this plant.
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The purest water I can get my hands on with just enough sea salt that the solution tastes faintly salty. Boil hard for a few minutes and let it cool. I make it about a pint at a time and keep in the refrigerator. I just put a little on a clean cloth or drop it in, doesn't matter. If my eyes are itching and red, it cures it completely and immediately, and lasts three or four hours.
I would never put anything other than cool, sterile saline in my eyes and I would never buy it in little plastic bottles from some factory.
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I use eyebright (both internally & as a rinse) for eye infections/conctivitis; simple saline solution to wash out foreign particles, followed with chamomile for simple irritation from dust & such; black or green tea compresses for puffiness/ swelling.
Olga, when I searched for a comfrey product, I believe the comfrey was paired with eyebright.
As a personal choice, I would not use comfrey on my eyes, but that's just me. For tired eyes and puffiness, a cold slice of cucumber does the trick for me unless the puffiness is due to some infection.
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