Benjamin Franklin, inventor of the bifocal, wrote: I therefore had formerly two pairs of spectacles, which I shifted occasionally, as in traveling I sometimes read, and often wanted to regard the prospects. Finding this change troublesome, and not always sufficiently ready, I had the glasses cut and a half of each kind associated in the same circle. By this means, as I wear my own spectacles constantly, I have only to move my eyes up or down, as I want to see distinctly far or near, the proper glasses being always ready.
If you work in a place where you need safety contacts or are an active sports enthusiast, peripheral vision contact lenses are suitable for your lifestyle. There are also special features with lenses that can be worn overnight.
Opticians may recommend several types of contacts that are best fit for your eyes. The most important thing is what the lenses are made of; soft lenses are often disposable, while hard contacts last longer but are more expensive.
Just a few decades ago, many people couldn't afford contact lenses. Today, however, the price is almost the same as typical eyeglasses, and more people are finding them favorable because they're lightweight and go unnoticed.
If you need an eyeglass prescription, opticians are the ones that will examine your eyes and recommend contacts or glasses that are right for you. There are different materials of lenses and special features you may want to talk over with your optician.
Corrective lenses go into glasses frames and are mainly worn to treat myopia, hyperopia, astigmatism, and presbyopia. Types of lenses include single vision, bifocal, trifocal, progressive, adjustable focus, aspheric, and plano.