if its the wrong color light I have a tough time also.... if your lights are 10-12yrs old, they probably are the wrong color.... wrong color usually equates to wrong wavelength.... try reading anything close to an unterviolet/black light and you will see the problem immediately. the closer you get to the light, the worse the problem is.
the "warm" or "soft" light in the 2700K to 3000K rating is the most comfortable and relaxing on the eyes, and will allow them to focus to their best ability in a normal setting.... the early LED lighting (and much of the cheaper current LED's) was/is a much harder/cool light that was hard on the eyes for long term use...
a proper living space LED will not have any noticeable difference than its incandescent counterpart...