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.
1 Active (Real or True) Power is measured in watts (W) and is the power drawn by the electrical resistance of a system doing useful work. 2  Apparent Power is measured in volt-amperes (VA) and is the voltage on an AC system multiplied by all the current that flows in it.