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also when I am in a windy environment , I usually have tears in my eyes. is this a symptom of dry eye and can be treated with eye drops.
I went online to buy Refresh eye drops. I see there are the sterile bottles and also in single use packagings.
are the preservative free product only available in single use packaging or are the cheaper sterile bottle ones also preservative free.
but the sterile bottle is not preservative free, right? and preservative free is better but cost more??