I agree with Frank, iron sights do not have batteries go dead. Most I am doing to help my 59 1/2 year old eyes is to put a few fiber optic front sights on. They are on my GP 100 and MK II and both are shot in competition. All my carry guns have factory sights.
NRA Life Member, NRA Range Safety Officer, IDPA Safety Officer, USPSA NROI Range Officer
As you are, I once was, As I am, You will be.