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.
You can measure electricity in watts, amps, volts, and ohms. Each of these units of measurement relate to a specific aspect of electricity. (See Electric Terms). Electric use is measured in watt-hours, kilowatt-hours, and megawatt-hours. It calculated using the following formula: Energy = Power x Time.In other words, you can measure electricity by multiplying the amount of required watts by the number of watt-hours used.Letâs consider a 200-watt incandescent light bulb. In an average month, letâs suppose youâll use the light bulb for 300 hours.n other words, you can measure electricity by multiplying the amount of required watts by the number of watt-hours used. Letâs consider a 200-watt incandescent light bulb. In an average month, letâs suppose youâll use the light bulb for 300 hours.