With spring in full swing I find myself tired of the constant dreary weather. At times, it is hot and sunglasses are required while a moment later it will rain and render my eyewear useless. I sought out a solution.
Oakley makes water-resistant eyewear with wicking powers, meaning rain may hit the lens but the chemical coating on the lenses as well as the aerodynamic and wetness-reducing shape of the frames and lenses is such that water does not stay on the surface of the lens for long. Some extreme outdoor sunglasses with prescription inlays from Oakley are designed to be blunt-trauma resistant, scratch and smudge and water resistant as well as aerodynamic. For the outdoor enthusiast, these are nearly essential in rainy weather locations.
Several models of Police sunglasses have a small ledge similar to a tiny roof overhang above the lenses. If the rain is coming down directly this ledge catches the rain and directs it, like a drainage pipe, off the eyewear to the side before it has the chance to hit your lenses. While this may work in direct rain, a rain from any direction will instantly render this ledge worthless.
Several of the Hugo Boss sunglass designs feature a slight slant so that the top of the lenses are further from your head then the bottom half. This barely-noticeable slant makes it possible for rain to avoid the lenses all together, when rain is coming down directly.
While wearing a hat or having an umbrella might also solve this problem, you can never bet sure to have either on hand and should, perhaps, spend the extra cash initially to have the right equipment for the environment. Any of the above designer eyewear brands has proven benefits in rainy seasons, and all can have an anti-fogging coating applied, which is also useful in high-humidity settings.