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Solar Eclipse Glasses
Solar viewer (also known as solar viewing glasses or solar eclipse glasses) are special eyewear designed for direct viewing of the Sun. Standard sunglasses are unable to filter out eye damaging radiation. Solar viewers are required for safe viewing of solar events such as solar eclipse, eclipses. The recommended Absorbance, optical density of this eyewear is 5. Safety According to the American Astronomical Society (AAS) products meeting the International Organization for Standardization, ISO 12312-2 standard avoids risk damage, and issued a list of reputable vendors of eclipse glasses. The organization warned against products claiming ISO certification, or even citing the exact standard number, but not tested by an accredited laboratory, or those bearing incomplete certification information. Another problem was counterfeits of reputable vendors' products, some even claiming the company's name (such as with American Paper Optics which published information detailing the differenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz (website)
''Quartz'' is an online news platform in English. It is focused on international business news. Quartz is privately held and was established in New York City in 2012. It is published in the United States with global business news and has specific publications for Africa, Hong Kong, India, Japan, and the United Arab Emirates. Audience and revenue ''Quartz'' targets high-earning readers, calling itself a "digitally native news outlet for business people in the new global economy". Sixty percent of its readers access the site via mobile devices. In August 2017, ''Quartz''s website saw about 22 million unique visitors. Approximately 700,000 people subscribe to its roster of email newsletters, which includes its flagship ''Daily Brief''. According to ''Ad Age'', ''Quartz'' made around $30 million in revenue in 2016, and employed 175 people. In 2017, revenue decreased to $27.6 million as advertising shrank. Uzabase (Japanese: ユーザベース) purchased the organization for $8 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prevention
Prevention may refer to: Health and medicine * Preventive healthcare, measures to prevent diseases or injuries rather than curing them or treating their symptoms General safety * Crime prevention, the attempt to reduce deter crime and criminals * Disaster prevention, measures taken to prevent and provide protection for disasters * Pollution prevention in the US, activities that reduce the amount of pollution generated by a process * Preventive maintenance, maintenance performed to prevent faults from occurring or developing into major defects * Prevent strategy, a scheme in the UK to report radicalisation * Risk prevention, reducing the potential of loss from a given action, activity and/or inaction * Risk management, the identification, assessment, and prioritization of risks in business Other uses * ''Prevention'' (magazine), an American healthy lifestyle magazine * ''Prevention'' (album), a 2009 album by the Scottish indie rock band De Rosa * Prevent defense, an Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophthalmology
Ophthalmology ( ) is a surgical subspecialty within medicine that deals with the diagnosis and treatment of eye disorders. An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. Following a medical degree, a doctor specialising in ophthalmology must pursue additional postgraduate residency training specific to that field. This may include a one-year integrated internship that involves more general medical training in other fields such as internal medicine or general surgery. Following residency, additional specialty training (or fellowship) may be sought in a particular aspect of eye pathology. Ophthalmologists prescribe medications to treat eye diseases, implement laser therapy, and perform surgery when needed. Ophthalmologists provide both primary and specialty eye care - medical and surgical. Most ophthalmologists participate in academic research on eye diseases at some point in their training and many include research as part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyewear
Eyewear consists of items and accessories worn on or over the eyes, for fashion or adornment, protection against the environment, and to improve or enhance visual acuity. Common forms of eyewear include glasses (also called ''eyeglasses'' or ''spectacles''), sunglasses, and contact lenses. Eyewear can also include more utilitarian forms of eye protection, such as goggles. Conversely, blindfold A blindfold (from Middle English ') is a garment, usually of cloth, tied to one's head to cover the eyes to disable the wearer's sight. While a properly fitted blindfold prevents sight even if the eyes are open, a poorly tied or trick blindf ...s are a form of eyewear used to ''block'' vision for a variety of purposes. {{Glasses Sunglasses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transit Of Venus
frameless, upright=0.5 A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and a superior planet, becoming visible against (and hence obscuring a small portion of) the solar disk. During a transit, Venus can be seen from Earth as a small black dot moving across the face of the Sun. The duration of such transits is usually several hours (the transit of 2012 lasted 6 hours and 40 minutes). A transit is similar to a solar eclipse by the Moon. While the diameter of Venus is more than three times that of the Moon, Venus appears smaller, and travels more slowly across the face of the Sun, because it is much farther away from Earth. Transits of Venus are among the rarest of predictable astronomical phenomena. They occur in a pattern that generally repeats every 243 years, with pairs of transits eight years apart separated by long gaps of 121.5 years and 105.5 years. The periodicity is a reflection of the fact that the orbital periods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
