Which feature aids in seeing below water while wearing sunglasses?

The feature that aids in seeing below water while wearing sunglasses is polarized lenses. Polarized lenses are specifically designed to reduce glare from reflective surfaces, such as water. When light reflects off a flat surface like water, it can create intense glare, making it difficult to see beneath the surface.

Polarized lenses have a special chemical coating that only allows vertical light rays to pass through while blocking horizontal rays, which are responsible for that blinding glare. This improves visibility and enhances clarity when looking into the water, allowing for better observation of underwater activities or objects.

The other options provide benefits for different scenarios but do not specifically enhance underwater visibility. For example, flash mirror coatings can reduce glare and improve aesthetics but do not address the issue of glare from water surfaces. Gradient tint helps with varying lighting conditions, often shading the top of the lens while allowing more light through the bottom, which isn’t tailored for water visibility. AR (anti-reflective) coating minimizes reflections on the lens surface but does not directly improve underwater vision.