I did get a bit of dry eye and I get haloes at dusk.
The haloes are caused by the correction being done in the middle of the cornea. At dusk your iris opens up wide and light is allowed in on the uncorrected area. It doesn't happen in bright light and it disappears after dusk when the ambient light has gone.
I used to have very tough, leathery eyeballs and could poke contact lenses in without blinking. My eyes were a little sensitive after the surgery and I am certainly very careful to look after my eyes now. I am addicted to wearing sunglasses (although I rarely wear them kiteboarding and never wear them surfing.)
The laser correction is immediate but the full correction does not bed in for 6-12 months after. The cost of the surgery includes unlimited after care. The after care consists of steroid eye drops that increase the internal pressure in the eye ball. (A bit like blowing up the balloon a little harder.) That adjusts the shape of the eye and affects the healing process.
What is supposed to happen is they over correct by up to 18% during the surgery then adjust during the healing so the end result is as near as perfect as possible. (I know about that stuff because the guy who did my eyes did the research that identified the amount of correction and the methodology for assessing people.)
I know of two cases of failures. One was a friend who got a cheap job from the shop downstairs from where she worked. The right amount of correction was not applied and she was re-treated 3-4 times until they could not treat her again. She now wears glasses again. The other was a chinese guy with the wierdest looking eyeballs you have ever seen. He rubbed them too hard and dislodged the flap. They fixed him up ok but it took 12 months to finish up.
It is a myth that they are going to blind you with laser beams. A failed treatment usually means re-treatment, or at worst, having to go back to glasses.
A little background reading:
www.newvisionclinics.com.au/published-articles/