Eyes are organs of the visual system. They provide animals with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and convert it into electro-chemical impulses in neurons. In higher organisms, the eye is a complex optical system which collects light from the surrounding environment, regulates its intensity through a diaphragm, focuses it through an adjustable assembly of lenses to form an image, converts this image into a set of electrical signals, and transmits these signals to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain.
It is, therefore, not surprising that weight loss has become a very topical subject over the years, not only for the obvious cosmetic reasons but also due to increasing awareness of the health risks to people who are overweight. There have been proven links between people being overweight and the development of conditions such as type 2 diabetes, coronary heart disease and stroke as well as some cancers, such as breast and bowel cancer.