Prescription sunglasses are sunglasses whose lenses are made with your own corrective prescription. They can not only protect your eyes from the harmful rays of the sun and glare but also enable you to see clearly. If you need a pair of glasses to be against sun-light.while driving,then the prescription sunglasses are fit for you.
I can't get it. Do you mean have strong prescription sunglasses to get clear vision? Or you looking for sunglasses while you driving to protect your eyes from glares and sunlight? If you the former, you need take eye exam and buy prescription sunglasses according to your prescription. Or if you looking for sunglasses to against glare, polarized sunglasses are the best choices for you.
Prescription sunglasses can help correct your vision problems. If you have some vision problems, you may need to buy a pair of prescription sunglasses. But if you don't have any vision problems, you can buy a pair of regular sunglasses. Sunglasses are designed to block harmful UV rays and filter glare. I suggest you to buy a pair of polarized sunglasses.
Prescription sunglasses are different from regulare sunglasses because they have a corrective prescription in their lenses. They can help correct a refractive error. They can block harmful UV rays and flare for your eyes and help you to see more clearly at the same time. But I think you don't need prescription sunglasses because you just said that you want to block strong galre, you don't mention that you have any vision problems.
I think you just need to buy a pair of polarized sunglasses. Polarized sunglasses can help filter the glare from the sun or the smooth surface of water or a road. There are sunglasses for driving. You can have a look in any eyeglasses stores. Hope you can find them soon! Good luck!