Polarized lenses protect your eyes effectively by also blocking also the scattered reflection (reflective light), unlike regular sunglasses that only protect your eyes from UV rays.

Therefore, polarized lenses are not optional but indispensable. Due to the property of light, it can be seen directly or reflected in objects. Polarized lenses block not only ultraviolet rays but also reflective light (scattered reflection) in these situations.

You can check the difference between regular and polarized lenses with a test card. You can see fish in the card with polarized lenses different from regular lenses.