“Across all five lenses, there is a clear convergence rather than irreconcilable conflict: red light therapy can be beneficial but crosses the Arndt-Schulz bio-inhibition threshold when intensity or dose is too high; coherent lasers introduce greater safety risk (particularly ocular) than non-coherent LEDs for most surface applications; there is no compelling evidence that 630 nm light bypasses the blood–brain barrier via formaldehyde dehydrogenase modulation; approved myopia-control devices remain within ANSI/JAMA exposure limits; and adipocyte pore formation appears real but must be paired with caloric deficit to prevent triglyceride re-uptake. In the absence of true divergences, a cautious-optimist posture best balances promise against safety.”