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WASHINGTON Customized AC Milan Jerseys , Nov. 4 (Xinhua) -- U.S. researchers who tested Google Glass said Tuesday the head-mounted display systems may create a partial peripheral vision obstruction, causing blind spots that may affect safety while doing routine tasks such as driving.


Interest in the wearable head-mounted display systems for general consumers has been growing, with multiple models in production. However, their effect on vision is largely unknown.


Peripheral visual field, a main component of vision, is essential for daily activities such as driving, pedestrian safety, and sports.


In the new study Cheap AC Milan Jerseys , Tsontcho Ianchulev of the University of California, San Francisco, and colleagues compared performance on visual field tests with Google Glass vs. regular eyewear to quantify their effect on visual function.


Perimetric visual testing, a measurement of vision field, was conducted in three healthy individuals with good vision, first with the wearable device, followed by regular eyewear of similar color and temple width, which was used as a control frame.


The results demonstrated significant blind spots in all the three participants while wearing the device Suso AC Milan Jersey , creating "a clinically meaningful visual field obstruction in the upper right quadrant," the researchers wrote.


The researchers also analyzed 132 images of people wearing the product and facing the camera, obtained from an Internet search, in a bid to assess how the devices are worn by general consumers.


The analysis indicated that many people wear the device near or overlapping their pupillary axis, which may induce blind spots and interfere with daily function.


The researchers admitted that the study is limited by the small number of participants, who may not be representative of all users, and that a larger sample is needed.


"Additional studies are needed to understand the effects of these devices on visual function, particularly as their use becomes increasingly common Riccardo Montolivo AC Milan Jersey ," they concluded.


The study was published in the Journal of the American Medical Association (JAMA).


BEIJING, Oct. 25 (Xinhua) -- A leading think tank expects lower gross domestic product (GDP) growth but better structure in China in coming years.


Yu Bin, head of macro economics with the development research center of the State Council, has said that China would shift steadily toward a "new normal economic state".


China's Q4 GDP is expected to rise 7.4 percent after a five-year low of 7.3 percent in Q3, said Yu on Friday.


He said the slump of old pillar industries after reaching peaks has dragged on the country's economy, but maintaining China's macro policies will be beneficial to economic restructuring.


Despite of overall slowing , some sectors had outstanding performances such as stable employment, increased profits and income and more consumption.


"China's annual growth target will be around 7 percent in 2015 Ricardo Rodriguez AC Milan Jersey ," Yu said. "Such growth is likely to continue in the next decade because of huge potential and long-term reforms."


Real estate and exports -- China's two old pillars -- have both entered a new stage that crazy surges are becoming stable expansion, reflecting the balanced "new normal" economy, Yu said.


"The new normal pursues targets of higher fiscal revenue, more employment, better livelihoods, lower risks and sustainable development," he added.


BRASILIA, Aug. 15 (Xinhua) -- The economic impact on Latin America of the Zika virus has been estimated to reach 18 billion U.S. dollars from 2015 to 2017 Patrick Cutrone AC Milan Jersey , the United Nations Development Program (UNDP) said here on Tuesday.


"Zika is responsible for tangible losses to gross domestic product, estimated to range from 7 billion to 18 billion U.S. dollars over 2015-2017 alone," according to a UNDP study.


The report, "A Socio-economic Impact Assessment of the Zika Virus in Latin America and the Caribbean," focuses on three of the countries worst hit by the mosquito-borne virus, Brazil, Colombia and Suriname.


Those losses impose "an immediate burden on health care and social welfare systems," but "more long-term Niccolo Zanellato AC Milan Jersey , could undermine decades of hard-earned health gains and social development progress," the study warns.


The UNDP report calls on countries to offset the adverse impact of the virus by investing more "in prevention, preparedness and response strategies at the local, national and regional levels."


Also, Zika is bound to have a greater impact on the region's more fragile economies, the agency said.


"While larger economies, such as Brazil, are expected to bear the greatest share of the absolute cost Mattia De Sciglio AC Milan Jersey , the severest impacts will be felt in the poorest countries," the report said.


Haiti and Belize, for example, could lose 1.13 and 1.19 percent of GDP annually, respectively.


The mosquito-borne virus has been linked to birth defects, with the number of infants born with microcephaly, or abnormally small heads, skyrocketing in Brazil following the Zika outbreak.


Video: Abe's misadventure in constitution revision


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