Doctor says for more than 4 times daily, patient should use no-preservative drops.
4 times a day really only for very normal people =.=
But anyone use preservative drops more than 4 times with no problem?
preservative free drops is expensive, or inconvinent if reuse the vial for more time...
Had try refresh liquigel, seems irritate although it says preservative decompose...systane may bad to use few more time (so bad in air-cond. room)
4 times a day really only for very normal people =.=
But anyone use preservative drops more than 4 times with no problem?
preservative free drops is expensive, or inconvinent if reuse the vial for more time...
Had try refresh liquigel, seems irritate although it says preservative decompose...systane may bad to use few more time (so bad in air-cond. room)
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