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I omitted this from my post on Dry eye treatment.

A humidifier is helpful.  I have a small humidifier by
my bed and run it while I sleep.

I prefer the kind that has an evaporative filter (air
passes through the filter - filter soaks up water -
air passing through is humidified).

Dry eye is aggravated by very dry air in the house.

Vicki Jones
Homewood, IL