Eye drop for your important eyes

I have been trying many brands of eye drops but my eyes always dry out, maybe because of my allergies. It’s hard to find the right eye drop to relieve dry eye problems.And then my eye doctor gave me a sample of Systane Lubricant eye drop, and I’ve been hooked on it ever since. I don’t need to use much of this because once a day seems to be plenty. It keeps my eyes moist all day long. And when I put on eyeshadow, mascara and it won’t irritate my eyes.
To be honest, the price is still expensive even though I bought a big 2-pack from Costco. Recently my husband got another brand “Refresh Plus Eye Drop” from Costco because of the price hoping it would be the same as Systane, but it’s not. I have to keep applying it throughout the day. I’m using a computer all day, so my eyes dry out and I need to keep putting in my eye drops.
Now I realize that Systane is the only eye drop that can keep my eyes moist. I’m going to go back to using Systane when this bottle runs out.