CRAO is considered a stroke of the eye. Studies show that about two-thirds of patients have underlying high blood pressure and one-fourth of patients will have significant carotid artery disease (plaque with narrowing of the artery lining), cardiac valvular disease or diabetes.
Electrical pressure is measured in volts, or voltage. All electrical devices are rated for specific voltages. Most devices and small appliances in a home are rated for 120 volts, while high-voltage appliances, such as electric dryers, ranges, and many baseboard heaters, are rated for 240 volts.
Across the countries we chose to compare household electricity use varies enormously. The average American or Canadian household in 2010 used about twenty times more than the typical Nigerian household, and two to three times more than a typical European home.âd estimate our normal household electricity consumption (i.e. not for heating) to be around 1500-2000 KWh/a. The heated surface area of the house is 185 m2 and includes a couple of rooms in the cellar.