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.
Contact lenses are an option for people who need a prescription for better vision but do not want to rely on eyeglasses every day. However, contact lenses require more than the prescription for correcting vision. The eye doctor must also measure the shape of the eye in order to prescribe the proper fit of lenses.