If aquired traits canot be passed on to ofsprings how do u explain defects in ofsprings with pps afec parents?

Please clarify pps. An aquired trait is by definition not genetic and not passed onto offspring. However, parents and offspring may share similar environments, lifestyles, activities, etc. For example, the risk for cataracts is not thought to be particularly genetic. But, if the parents smoke tobacco and the children smoke tobacco, the tobacco use increased the cataract risk for both groups.