Variable neutral density (ND) filters are handy tools for photographers, in that their opacity can be adjusted simply by ...

Tint is defined as the percentage of light the lens blocks. Commercially available sunglasses have tint intensities that ...

Best for: Gamers, pilots, hunters and winter athletes. Yellow or orange-tinted sunglasses are perfect for moderate- to low-light conditions, per REI. They can be helpful in foggy, hazy or overcast ...

Orange lenses (not tested) may be more effective for improving sleep because they block out blue light almost completely and reduce the intensity, or brightness, of light. Advanced Search Home ...