A commodity market is a market that trades in primary economic sector rather than manufactured products.Soft commodities are agricultural products such as wheat, coffee, cocoa, fruit and sugar. Investors access about 50 major commodity markets worldwide with purely financial transactions increasingly outnumbering physical trades in which goods are delivered.Treatment is aimed at the primary cause, but plus lens correction, and in some cases exercises such as accommodative facility training are prescribed.
Exchange-traded funds (ETFs) began to feature commodities in 2003.
Commodity-based money and commodity markets in a crude early form are believed to have originated in Sumer between 4500 BC and 4000 BC.
Sumerians first used clay tokens sealed in a clay vessel, then clay writing tablets to represent the amount—for example, the number of goats, to be delivered.
Accommodative power declines almost linearly with age so that about age 45 most people with normal refraction suffer a degree of accommodative insufficiency.
Age-related accommodative insufficiency is also known as PRESBYOPIA.