Personally I use preservative-free eye drops with hyaluronic acid [1] and they help out tremendously. I also use a heated dry eye mask, but I don't know if that helps with Lasik cases.
But it's best to try to treat it sooner rather than later. I ended up seeing my ophthalmologist in the first place because my cornea got damaged and infected, and he said that the eye dryness could have been a contributing factor.
They have a MGD Drop (red packaging) which is liquid/oily and an Intense drop (purple packaging) that is nice and thick.
You can find them rarely at retail pharmacies as they are still expanding in the US but you can order them on Amazon.
(I'm interested because my sister has just had eye surgery and while she is still adjusting to her new vision, she said something about potential dryness)
Regular fish oil pills from Amazon or Walmart. My eye Dr recommended it. Just took a couple before bed.
For me the dry eyes started a year after the laser eye surgery. Really only night time was a problem.
The other thing that might have helped was installing a whole house humidifier.
Do you mean cod liver oil capsules?