인공 눈물 thera tears 1회용을 쓰는데 오픈후 하루동안 써도 될까요?

I use Allergan Refresh tear for 1+ wks after opening+closing. So far, no problem for 10+ yrs.
I even use water after facial wash. That is good too or even better than artificial tears.

But N=1 case…