think this is the wrong thread,but I passionately feel for your problem,the bright light drives me crazy
For Windows 7+ simply use screen magnifier(already pre-installed in windows)
** If one program is all you need it for or wish to use it for,add screen magnifier to your taskbar,so click your program and click the screen magnifier,click it again to disable when required
If your in your job and you need it
Option 1. go to task manager,hit profiles,and find high contrast
Option 2. on firefox,click options,click colors,change background to black,maybe text to yellow,unclick allow sites to choose their own colours,if you have access to download add ons download BYM(blank your monitor)
For Phones Android 4.0 and greater
You can activate negative colours from settings
For older Phones
Download opera for android but also download opera for windows
on windows find the wb.css file it is inside the opera folder under styles,save this file to your phone
navigate to opera:config, type in local CSS,locate file on your phone and your browser has white on black colors,and since it is a professional CSS file,the output is perfect