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Kentucky's Ashland Oil and Refining Company founder and CEO, Paul G. Blazer (1890–1966), served twice as a government salaried dollar-a-year man: from 1933 to 1935 under President Franklin D. Roosevelt's National Recovery Administration on the Code of Fair Competition for the Petroleum Industry [12] as Chairman of the Blazer Committee [13] and a second time during World War II as Chairman of ...
Eyewear retail is a steadily growing business, driven by the rising global population, economic development, increased consumer purchasing power, and the global prevalence of ocular diseases. [48] The increased use of digital screens has led to an increase in vision impairment , cataracts , myopia , hypermetropia , eye irritation , dry eyes ...
Category 0 – 80%-100% transmission – for fashion, indoor use, or cloudy days; Category 1 – 43%-80% transmission – low sun exposure; Category 2 – 18%-43% transmission – medium sun exposure; Category 3 – 8%-18% transmission – strong brightness, light reflected of water or snow
The Glasses Apostle by Conrad von Soest (1403) Seated apostle holding lenses in position for reading. Detail from Death of the Virgin, by the Master of Heiligenkreuz, c. 1400 –1430 (Getty Center). French Empire gilt scissors glasses (with one lens missing), c. 1805
A prescription of −1.00 +0.25 × 180 describes a lens that has a horizontal power of −1.00 D and a vertical power of −0.75 D. Only ophthalmologists write prescriptions in + cylinder. An optometrist would write a prescription in - (minus) cylinder.
Research continues in an attempt to eliminate the limited field of vision in current bifocals. New materials and technologies may provide a method which can selectively adjust the optical power of a lens. Researchers have constructed such a lens using a liquid crystal layer applied between two glass substrates. [citation needed]
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