For the majority of people, when they discovered a Spiritual Eye, they would seal them off in a barrier, causing the spiritual energy in the area to become particularly strong which would then ease cultivation.
For the already formed worlds, this impact would certainly be much smaller.
Taking the Tempest Ocean Realm as an example, it was rich in spiritual energy had abundant Spiritual Eyes, hence the meager impact.
However, for a world that was rapidly recovering like the earth, Spiritual Eyes becoming privately occupied would greatly affect the speed of spiritual energy recovery.
Therefore, a long time ago, the Earth Federation had enacted laws prohibiting private possession of Spiritual Eyes, and whoever was caught would get their entire clan executed. So far, there had been no exceptions.