How it Workx on Instagram: "Humans can’t naturally see clearly underwater because light bends differently in water than in air, causing the cornea to lose its ability to properly focus images, which is why everything looks blurry and washed out below the surface. Some trained divers, including United States Navy SEALs, learn techniques to slightly improve clarity for short tasks, such as narrowing their eyelids to create a pinhole effect that limits incoming light and sharpens outlines. While th