What is the difference between blindness and visual impairment?

If it is determined that the individual is blind, it means that he is unable to see, which can be a total lack of vision or from a legal point of view to determine the level of government aid. Legal blindness in some countries, such as the US, applies to a vision that is axle at 20/200 maximum visual field (VA) or lower. International Classification of Diseases-10 assigns the extent of sight with reference to visual impairment, from mild to serious to blindness, which is the deepest. Visually disability can mean several things, the most basic is that even in medical correction, one does not see well enough to work without further help. There are different degrees of blindness and visual impairment is a general term defining the condition as a whole. Since 2011, 284 million people have suffered blindness and visual impairment. Some are absolutely blind, which means no types of light or have VA that is very low - 10/200 (3/60 meters) or less. People classifiedAs a slight to severe visual impairment, they have weak visions and can see, although not well enough to do certain things such as drive or reading, even after repair. Low visual VA ranges from 20/60 (6/18 meters) or lower, up to slightly better than 10/200 (3/60 meters).

The causes of blindness and visual impairment, especially in the adult population, include diabetes, cataracts and refractive errors that are not repaired. For remedial visual impairments, such as myopia and astigmatism and refractive errors, most contribute to blindness and impairment of sight around the world. Most causes are treatable and can be prevented, including vitamin A deficiency, which is responsible for many world blind children. Lack of medical equipment and supplies are some of the factors affecting the availability of treatment as the World Health Organization in 2011 states that 90% of people in the world live in poverty, even when60% of them could be effectively treated and prevent another 20%.

Life with visual impairment brings with it a lot of challenges, most of which seem simple or are usually taken for granted by those who are not visually disabled. Normal everyday tasks such as food shopping, driving, reading a book or walking require either a person, a guide dog or a device. Most activities can be achieved by a different approach. For example, Braille allows those who are visually impaired to read and write using a dotted code that can be touched. Special cooking dishes, such as timers with a large number and color coding, allow food preparation.