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.
State board recommendations vary between different states, but generally glasses prescriptions are only valid for two years, and contact lens prescriptions are typically only valid for 1 year (some states may vary). Even those who feel that nothing has changed should have regular check ups.