I've found that f.lux words pretty well on my PC, I use Twilight on my android devices. Twilight is good, but f.lux is better because you can adjust it to the level/tone of light you wish. Twilight is nice though.

Something else to consider. Depending on your laptop's reading software, if I use my backlit device to read on at night then I will change the page display in the software to either sepia or green which is easier on the eyes than the white background. I also like the black background but not at night as the contrast between background and text is too pronounced.

For me, it's been very helpful to make these changes, and I try not to use any electronics in that last 30-45 minutes before bed. It helps me to sleep. I also have dry eyes but for a different reason - scrubbing my eyelids with baby shampoo has pretty much taken care of THAT problem (was very surprised when this was recommended at my last eye exam). Apparently if the pores on our eyelids get blocked then it greatly affects tear production - & I don't wear eye makeup. Very interesting.

Good luck on finding something that works! It would be nice if f.lux were available across more platforms as it really does a nice job without losing sharpness.