Hemispatial neglect results most commonly from strokes and brain unilateral injury to the right cerebral hemisphere, with rates in the critical stage of up to 80% causing visual neglect of the left-hand side of space.
They are boiled eggs that are pickled with spices. You can learn how to make pickled eggs at home, and they can be stored in the refrigerator for 1 to 2 weeks.
(although I don't know if I'd let these guys clean out my fridge.)     So if you take an average of all of this information, I'd say you can most safely keep pickles for 12-18 months. Anything beyond 18 months and I'd take a good, long look at them before eating.