They are medical devices that can provide many people with improved self image, confidence, sport performance and convenience. Millions of people now wear them successfully, however they can cause eye damage if not correctly fit or correctly worn.
Glasses provide good correction for most types of vision problems.
They are fairly easy to get used to, but can restrict peripheral vision, fog up, and just get in the way at times. Contact lenses offer superior correction for some vision problems, but may not be suitable for others. They provide excellent peripheral vision and a more natural vision, but they require a gradual buildup of wearing time. The type of contact lens that is best for you is determined by several factors such as your vision problem, your eye health, and your lifestyle. Hard lenses have been around for fifty years, but no one fits them anymore due to the eye health problems they can cause.