In Britain, unlike the U.S., there are two types of opticians: ophthalmic opticians, who can do eye tests and write prescriptions, and dispensing opticians, who make and dispense lenses. Only the latter type is called an optician in the United States.

In the U.S., opticians are allowed only to dispense eyewear. In most states (though not all of them -- Oregon is an example), an optician must be licensed and certified, and must have completed at least a two-year associate's degree in opticianry.

Many optician offices (especially the large chain stores) generally have an optometrist on the premises who can test your vision and prescribe eyewear. If you're finding it hard to make a decision, walk into some of the eyewear stores in your mall and check out the doctors available.