BUYING CONTACT LENSES: NEW WORLD OF CHOICES By LISA BELKIN Continue reading the main story Share This Page Share Tweet Email More Save VIEW PAGE IN TIMESMACHINE , Page 001044 The New York Times Archives In 1887, when they were first invented in Switzerland, there was one kind of contact lens, which was made of glass and covered the entire eye. Today, there are more than 40 different brand names of contact lenses in the United States, including hard ones, not-quite-so-hard ones, soft lenses for daily wear, soft lenses that can be worn for weeks at a time, bifocal lenses and lenses with tints. As modern versions become more comfortable, more effective and more popular, choosing among them becomes more complicated. ''The ideal contact lens is one that is well tolerated, that you see well with,'' said Dr. Jorge Buxton of the New York Eye and Ear Infirmary. ''It's not going to be the same for everyone. There's not one answe...