It might reduce dryness-related pain, or wash out any dust or eyelashes that were causing irritation. Unless you are sensitive to the preservatives, saline solution would do the same and be more convenient. They have single-use saline packets for people with preservative sensitivity, but those are kind of pricey, so I can see the case for boiled water.
People get weird ideas and can be stubborn about them. My father spent more than a week using Clear Eyes in an attempt to moisturize. (Clear Eyes is a product to reduce red appearance, is not meant to improve eye comfort, and causes rebound irritation as the blood vessel constrictor wears off.) It took multiple talks after his eye irritation was only getting worse to convince him to switch to the actually moisturizing drops the eye doctor had given him.
It might reduce dryness-related pain, or wash out any dust or eyelashes that were causing irritation. Unless you are sensitive to the preservatives, saline solution would do the same and be more convenient. They have single-use saline packets for people with preservative sensitivity, but those are kind of pricey, so I can see the case for boiled water.
People get weird ideas and can be stubborn about them. My father spent more than a week using Clear Eyes in an attempt to moisturize. (Clear Eyes is a product to reduce red appearance, is not meant to improve eye comfort, and causes rebound irritation as the blood vessel constrictor wears off.) It took multiple talks after his eye irritation was only getting worse to convince him to switch to the actually moisturizing drops the eye doctor had given him.