As someone who suffers from health anxiety, I have been worried a lot about my eyes recently after seeing some articles talking about Macular Degeneration. I have also seen studies like this one https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2831109/
which seem to say that if some of these harmful reactive oxygen species in your eyes are produced, that causes a cascade effect where it goes on to cause further damage. Does this mean that even in a young person, if something happens that causes these ROS to be generated (e.g. Long term exposure to bright blue light, smoking etc), does this then result in a chain reaction which can cause conditions like Macular Degeneration, or does it not progress in this way?