I have very bad problem with floaters and since my eye troubles started I've struggled to stare at "white light" it gives me a headache and since my job requires me to use computers it is a nightmare, I use this program daily to give my screen a cool blue overlay that helps to reduce the harsh white light and allows me to do my job.
Tip: You can run more than one screen simultaneously to create very low contrast, and create very specific colors, or make one of the layers black to control the brightness on one layer, and the color on another layer
My school uses this and it is perfect unless used on Windows 8.