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Aetna Inc. (/ ˈ ɛ t n ə / ET-nə) is an American managed health care company that sells traditional and consumer directed health care insurance and related services, such as medical, pharmaceutical, dental, behavioral health, long-term care, and disability plans, primarily through employer-paid (fully or partly) insurance and benefit programs, and through Medicare.
Abbreviation Term Description (notes) AC: Anterior chamber: fluid-filled space between the iris and the endothelium: AC 4/4: Grade 4 anterior chamber angle: open angle between cornea and iris
Hackensack Meridian Health, locked in a contract dispute with Aetna, has sent letters to the insurer's customers warning them that they may lose in-network coverage if the two sides can't reach a ...
Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.
In January 2017, Essilor and Luxottica announced the merger of their activities. After having received the necessary authorizations from the competition authorities of the United States, the European Union, Brazil, Canada and China, EssilorLuxottica was created on 1 October 2018. [5]
In glasses with powers beyond ±4.00D, the vertex distance can affect the effective power of the glasses. [4] A shorter vertex distance can expand the field of view, but if the vertex distance is too small, the eyelashes will come into contact with the back of the lens, smudging the lens and causing annoyance for the wearer.
Randolph Engineering produces shooting eyewear, sunglasses, and prescription eyewear. Their products come in a variety of lens and frame styles, the most popular being the traditional aviator style. Each pair of sunglasses is made nearly entirely by hand in a detailed 200-step process. [11] An average of 53,000 pairs of glasses are produced per ...
Ditto (stylized as DITTO) was a company that sold software that enabled eyewear companies to sell their products online using virtual fitting. Originally Ditto was a retailer that sold designer prescription eyeglasses and sunglasses. The company was originally based in San Francisco, CA [1] before moving to Oakland, CA in 2018. It used virtual ...