For example, if you have myasthenia gravis, you may notice that during a meal, your jaw muscles become tired and weak, interfering with your ability to chew food. After you have rested for a little while, the muscles may become strong again, allowing you to resume eating.
Reentry Permits. If you hold a green card and know in advance that you must be outside the United States for more than one year, it's worth applying to USCIS for a reentry permit. This lets you to stay away for up to two years. See â Reentry Permits: Preparing Green Card Holders for Long Absences from the U.S. â.
Generally speaking if you are outside the US for less than 6 months you should not encounter difficulty, if you are outside from 6-12 months there is a rebuttable presumption that you have abandoned your green card and if you are outside over 12 months there is an irrebuttable presumption that you have abandoned your status.