While it was the most deadly earthquake and the fifth deadliest natural disaster in history, there have been earthquakes with higher magnitudes. Aftershocks continued several times a month for half a year.
What eye prescription is considered legally blind? A: In order to be considered legally blind, a person must have a score of no better than 20/200 on a vision test while wearing corrective lenses, according to WebMD. The test may also be administered with a restricted field of vision, but the results must be the same. Continue Reading.
People with vision that is worse than 20/200 with glasses or contact lenses are considered legally blind in most states in the United States. Vision loss refers to the partial or complete loss of vision. This vision loss may happen suddenly or over a period of time. Some types of vision loss never lead to complete blindness. Blindness has many causes. In the United States, the leading causes are: Accidents or injuries to the surface of the eye (chemical burns or sports injuries)