Sunglasses are a necessary accessory during every vacation, and wearing them during vacation is obligatory because of the very nasty effects which the sun’s ultraviolet (UV) rays can have not only on your skin (which is why you wear sunblock) but also on your vision. Prolonged exposure to UV radiation hurts your eyes just as staring directly at the sun. These kinds of radiation cannot easily be absorbed by our body and cause harm to the tissues in your skin and eyes, which is why you should protect them.
Now of course it can be rather unpleasant to constantly wear sunglasses, especially if you have a vision problem and you need correction of your vision in order to see clearly and sharply. It can be very frustrating to see blurry images all the time, and it doesn’t look good to wear one pair of glasses over the sunglasses themselves. All these problems can easily be helped by buying bifocal polarized sunglasses. The bifocal lens correction makes sure you can see perfectly sharp, even if you are of older age and need bifocal lenses, and this makes sure you can look far away and read a magazine at the same time without changing glasses.
The polarization of these sunglasses is important, too, because unlike normal sunglasses, polarized ones can keep all glare and extremely bright light from your eyes so you do not have to squint anymore, whatever you are looking at. This is most important when you’re in a reflective environment such as the sea or snow-covered mountains because these surfaces reflect light easily.
Of course polarized bifocal sunglasses are, just as any other type of glasses, becoming far cheaper with each year because new production methods are being discovered all the time. Nevertheless you should look for a quality pair of glasses if you want to use them for a long time.