If you have no halos or starburst then you are indeed, "lucky". I really do not understand how some do not have halos. After all, the cornea has just been sliced and burned. Stands to reason that after that trauma there would be some scattering of the light as it passes thru the cornea and that causes halos. I suspect that some patients are just more sensitive to the scattering.
I used preservative drops for about 3 weeks, then switched. My doc wanted 2 weeks of preservative free. I went to the non-preservative because it is cheaper and I can carry a re-usable bottle along in my pocket for easy hydration.
I have noticed that the halos are diminishing but still very apparent at night. I understand that it can take months for them to disappear, if in fact, they ever do disappear. Sure am hoping!