Sodium was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide. Many sodium compounds are useful, such as sodium hydroxide (lye) for soap-making and sodium chloride for use as a de-icing agent and a nutrient (edible salt). Sodium is an essential element for all animals and some plants.
Facts About Age-Related Macular Degeneration This information was developed by the National Eye Institute to help patients and their families search for general information about age-related macular degeneration.
From Wikipedia, the free encyclopedia. Macular degeneration, often age-related macular degeneration (AMD or ARMD), is a medical condition that usually affects older adults and results in a loss of vision in the center of the visual field (the macula) because of damage to the retina. It occurs in dry and wet forms. Hypertension (high blood pressure) Individuals with high blood pressure are more likely to be affected by age-related macular degeneration. 2  This is because high blood pressure, like smoking, leads to a constriction, or narrowing, of the blood vessels in the choroid which gives blood and oxygen to the retina.