Progressive Conservative Party of Canada | Progressive Conservative Party of Ontario | progressive | Progressive Conservative Association of Alberta | Progressive | progressive metal | United Progressive Alliance | Progressive Conservative Party of Saskatchewan | Democratic Progressive Party | Progressive metal | Progressive Conservative Party of Manitoba | Progressive Conservative Association of Nova Scotia | Progressive Field | Progressive Corporation | progressive bluegrass | People's Progressive Party | New Progressive Party of Puerto Rico | Progressive tax | Progressive Liberal Party | Italian progressive rock | Vermont Progressive Party | United Progressive Party | Progressive Reform Party | Progressive Policy Institute | Progressive Party of Manitoba | Progressive education | Progressive Conservative Party of Prince Edward Island | Progressive Conservative Party of New Brunswick | The Progressive | Serbian Progressive Party |
Current Bifocals and progressive lenses are static, in that the user has to change their eye position to look through the portion of the lens with the focal power corresponding to the distance of the object.