Glare Filters can be caused directly from light shining in eyes or indirectly from reflections on computer monitors and other surfaces. It reduces glare up to 99% to help prevent eyestrain and headaches related to computer monitor use. It also blocks up to 99.9% of ELF/VLF E-field radiation, and reduce static and dust built up when properly grounded. It can be available in flat or contour frame design.