Sunglasses can be either ridiculously expensive or dirt cheap. Most people tend to buy the least expensive kind they can manage, simply because they know that they will treat them badly and like they are disposable and are unwilling to pay extra for something they know they won't own long. Unfortunately, buying cheap sunglasses can make you pay a much bigger price. If you don't get special lenses that will filter the UV rays, your eyes and even eyelids could get burned or even get cancer. This sounds dramatic, but is the truth. Special lenses are made that will help reflect off the higher amounts of UV, especially in the summer when they are their peak.
In addition to the protection to your eyes that special lenses offer, they will also usually come with other perks, like shatterproof lens options. You may find that the more expensive brands offer sunglasses that are made to stand up to rough treatment, may be scratch resistant or even feature special vision accents to help you drive at night. Depending on your budget and your specific needs, it may actually save you money in the long run to invest in more expensive glasses, because they last longer and offer better protection.
Once you have decided that you need special lenses to keep your eyes in top shape, you will need to decide what styles suit your face the best. There are four basic face shapes: oval, round, heart and square. Certain frames will suit certain face shapes, so not just anything will do. Oval does best with a wide top section for sunglasses, round needs a rectangular shape, heart shaped does well with pointy temple pieces and narrow frames for the square.
Eventually, you need to consider the fit of the frames that are holding your special lenses. If these glasses are uncomfortable to wear, chances are, you won't wear them. If they sit lightly atop the bridge of your nose, don't slide down when you move your head and grip the ears comfortably, you have a winning pair of glasses. Remember, quality lenses cost more but offer so many benefits that they pay for themselves many times over. Your eyes are precious and need all the help that they can get.