Look for a “polarized” label on the lens, frame, case, or packaging
Check the product description or receipt for “polarized”
Hold the sunglasses in front of a reflective screen and rotate them 90 degrees; if the screen darkens or changes noticeably, they are likely polarized
Look at an LCD screen through the lenses and tilt the glasses; if the image darkens at certain angles, they are likely polarized
Compare them with another polarized pair using both lenses together; if the view changes significantly when rotated, they are polarized
Shine a light on a reflective surface and view it through the lenses; reduced glare can indicate polarization
Use a polarization test card if available
Ask an optician or retailer to confirm with a polarization tester
Check whether the lenses block glare from water, glass, or shiny surfaces more effectively than non-polarized lenses
Verify the manufacturer’s model number online to see if the lenses are listed as polarized