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.
1 Wet macular degeneration affects only about 15% of people who have age-related macular degeneration but accounts for two-thirds of the people who have significant visual loss. 2  More than 200,000 new cases of wet age-related macular degeneration occur each year in the United States.