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.
Con tact lens prescription does differ from spectacle prescription, mainly due to the distance between the spectacle and your eyes. For those with spectacle prescription less than -4.00 D, the difference is insignificant. Patients can choose to wear either the same prescription or slightly lower. Spectacle prescription of -4.00D above, the difference with contact lens prescription will become more significant. The chart below, is a conversion chart of spectacle prescription to contact lens prescription.