OPN also plays a role in our daily lives by protecting us against the blue light being emitted from screens, as evidenced by Chang et al. in 2016 in a series of mice that were exposed to blue light-emitting diodes and were later found to have increased expression of OPN in their retinal tissue, indicating that OPN could be considered a marker of retinal degeneration [73]. This evidence concerns the gene SPP1 and retinal degeneration.