Amsler grid Amsler grid The Amsler grid, used since 1945, is a grid of horizontal and vertical lines used to monitor a person's central visual field. The grid was developed by Marc Amsler, a Swiss ophthalmologist. It is a diagnostic tool that aids in the detection of visual disturbances caused by changes in the retina, particularly the macula (e.g. macular degeneration, Epiretinal membrane), as well as the optic nerve and the visual pathway to the brain. In the test, the person looks with each eye separately at the small dot in the center of the grid. Patients with macular disease may see
Smart grid in China grid project. In 2012, China’s Tianjin Economic-Technological Development Area (TEDA) signed an agreement with the U.S. Trade and Development Agency (USTDA) to deploy its first demand response pilot project. Honeywell was selected in 2011 to develop the smart grid project and implement its automated demand response (ADR) technology to temporarily decrease energy use in commercial and industrial facilities. The reduction is triggered when citywide consumption peaks and threatens to outpace the ability to produce power, which creates instability, and the potential for brownouts and blackouts. The project is part of a grant agreement between the State Grid Electric Power Research