What are the four foundation elements of supply chain management? The four foundation elements of supply chain management are  purchasing, production, logistics and processing or collaboration  between trading partners.
Short-sightedness (myopia) Other people have eyes that are too long, so the light focuses in front of the retina (they are short-sighted). This means that they cannot see things clearly if they are far away from them (such as the TV or board at school).
[edit on Wikidata] Far-sightedness, also known as hyperopia, is a condition of the eye where light focuses behind, instead of on, the retina. This causes close objects to be blurry while far objects may appear normal. As the disease worsens objects at all distances may be blurry. Other symptoms may include headaches and eye strain.