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Consumers' Checkbook/Center for the Study of Services (doing business as Consumers’ CHECKBOOK) is an independent, nonprofit consumer organization.It was founded in 1974 [1] in order to provide survey information to consumers about vendors and service providers.
In 1959, the contact business unit started as Frontier Contact Lenses in Buffalo, New York. [2]The surgical business unit started when implantable medical device company Heyer-Schulte Co., started a ophthalmic research division, named Heyer-Schulte Medical Optics Center (HSMOC), focusing on aphakic lenses and extended-wear cosmetic contact lenses.
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.
In the US market, soft contact lenses are approved by the US Food and Drug Administration. [2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them. [3] These include: soft contact lenses; rigid gas-permeable (RGP ...
First workshop of Carl Zeiss in the center of Jena, c. 1847 Carl Zeiss Jena (1910) One of the Stasi's cameras with the special SO-3.5.1 (5/17mm) lens developed by Carl Zeiss, a so-called "needle eye lens", for shooting through keyholes or holes down to 1 mm in diameter 2 historical lenses of Carl Zeiss, Nr. 145077 and Nr. 145078, Tessar 1:4,5 F=5,5cm DRP 142294 (produced before 1910) Carl ...
Which? is a United Kingdom brand name that promotes informed consumer choice in the purchase of goods and services by testing products, highlighting inferior products or services, raising awareness of consumer rights, and offering independent advice.