Editing Corrective lens (section)

== U.S. legal requirements for prescriptions ==
In the United States, laws at the federal and state level govern the provision and effective dates of prescriptions for contact lenses and eyeglasses. Federal law requires that eyeglass and contact lens prescriptions be given to every consumer and that the prescriptions be for a minimum of one year. (FTC Section 456.2 "Separation of examination and dispensing" was reviewed in 2004: [http://www.federalregister.gov/articles/2004/02/04/04-2234/ophthalmic-practice-rules#p-3 FTC 2004 review of section 456.2]).

State laws vary. For example, California law also requires prescriptions to be provided to clients whether demanded or not. Eyeglass prescriptions must be for a minimum of two years, and contact prescriptions must be for a minimum of one year.<ref>{{Cite web|url=http://www.leginfo.ca.gov/cgi-bin/waisgate?WAISdocID=0728142708+0+0+0&WAISaction=retrieve|title=WAIS Document Retrieval|website=www.leginfo.ca.gov}}</ref>