how would the organisms in the food chain web be affected if all the lights in the Eagles in the world to become disease and died which organisms would be a directly affected

Well that depends on the organisms that are considered to be prey of Eagles because they are tertiary consumers. They're the top of the food chain. However, their absence could cause an average growing species to become an invasive one. This could cause a struggle in competition. Fish and small birds could grow out of control.