There are lots of fantastic frames available these days for people who need to wear glasses. However, it is really important to talk to your optometrist about what frame suits your prescription the best. Some people who have high prescriptions, or who need varifocals/bifocals will need good advice to make sure that their frames best suits their lenses and fit on their faces properly. This is particularly important for children.
If you have a high prescription, it does not mean that your lenses have to be really thick! Modern lens materials mean that your optometrist can make your lenses thinner and lighter than ever before. You can have a special coating on your lenses, called a reflection free coating, which cosmetically makes your lenses look clearer but also makes tasks like computer work and night driving more comfortable on your eyes.