Harm from blue light exposure increases with age
The damaging effects of daily, lifelong exposure to the blue light emanating from phones, computers, and household fixtures worsen as a person ages. The novel aspect of this new study is showing that chronic exposure to blue light can impair energy-producing pathways even in cells that are not specialized in sensing light. The specific reactions in mitochondria were dramatically reduced by blue light, while other reactions were decreased by age independent of blue light. You can think of it as blue light exposure adding insult to injury in aging flies.

Source: 10.1038/s41514-022-00092-z