People with stained or chipped teeth can opt to get dental veneers, which cover existing teeth. But you do not need to have damaged teeth for veneers. Some individuals actually get veneers purely for cosmetic purposes so that they can achieve their dream smile.
If you have extensive tooth decay, you should get it treated first before getting veneers. Another reason why you may want to reconsider is if you grind or clench teeth while sleeping (bruxism). Talk to your dentist first so you can be prescribed a bite splint, particularly if your teeth require grinding down before veneer application.