Instructables member Dimovi shares a wonderful hack where you can turn your old LCD monitor into a privacy monitor! The crazy thing with this privacy monitor is that it  looks all white to everybody except you, because you are wearing “magic” glasses!
People might think you are crazy, staring at a blank white screen wearing sunglasses! But I guess that makes it even more fun!
Materials required for this build are:
- An LCD monitor of course
- Single use 3D glasses from the movie theater (old sunglasses are just fine)
- Paint thinner (or some other solvent such as toluene, turpentine, acetone, methyl acetate, ethyl acetate etc)
- Box cutter (and CNC laser cutter)
- Screwdriver or a drill
- Paper towels
- Superglue
You can refer the step-by-step procedure of making this project here.