What is the Best Privacy Screen Filter for Monitors?
To get the best screen privacy for your visual data, you’re probably going to look for a few key features. These will help you get the most protection with the least effort. 

Easy Installation
To make things simple, make sure that the privacy filter is easy to install. (And also make sure it’s easy to add or remove if that’s what you’re going to be doing.)

Screen Privacy with ViewSonic Privacy Filter
Small Viewing Angle Since the goal is screen privacy, make sure that whatever screen filter you use has very limited viewing angles. For example, ViewSonic’s VSPF series has a viewing angle of just 60°. 

Minimal Effect on User Experience
While we want to make sure others can’t see the screen clearly, it’s important that the privacy screen doesn’t affect the user’s experience. A high-quality privacy filter screen protector will have virtually no impact on display quality.

Want to see the difference a good privacy filter makes? Take a look at the YIPI for more on ViewSonic’s privacy filter screen protectors (or find one that fits your screen here.)