felkattamikallus.Eyewear is used to cover or protect the eyes from harmful ultraviolet rays. It is generally made of an opaque material to keep people from being exposed to damaging ultraviolet rays. However, the lenses used in conventional eyewear may be broken or lose their transparency, and for wearers who have damaged lenses, replacement lenses may be difficult to obtain.
Conventional anti-UV or UV-resistant eyewear generally uses a pane of glass with a coating thereon to prevent the passage of UV rays. One type of UV-protective glass uses a coating that changes the spectral transmittance characteristics of the glass. When exposed to UV radiation, the film absorbs it at certain wavelengths and transmits the remaining wavelengths. Other types of UV-protective glasses are known that use a so-called “UV-transmitting filter” that filters the incoming radiation in the near UV/UV-A region while transmitting the remainder.
For an example of prior art glasses using UV-transmitting filters, see U.S. Pat. No. 4,373,013, issued Feb. 15, 1983, U.S. Pat. No. 6,515,045, issued Feb. 4, 2003, U.S. Pat. No. 7,030,114, issued Apr. 18, 2006 and U.S. Pat. No. 7,211,631, issued May 1, 2007.
Conventional eyewear is also used to protect people who work in the fields of agriculture and forestry from harsh conditions such as high noon or high sun, dusty environment, and the like. In the fields of agriculture and forestry, UV-resistant eyewear is needed.Thursday, February 18, 2016
Hiking trails in the Dominican Republic
Twice a month we’ll be posting a series on our guidebooks, New Travel Classics. This is a group of popular travel guides that have been published in recent years and that have survived the test of time. We hope you enjoy them as much as we do!
Hiking through mountainous rainforests in the Dominican Republic is an unforgettable experience for anyone who loves nature. Hiking trails in the Dominican Republic offer great hiking challenges and rewards. From hikes in the rainforest to hiking up volcanoes, there are many possibilities in the eastern half of the country.
The eastern part of the Dominican Republic is called the Cordiller
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