Proof Engine Verification: Smartphone screens deliver ~80-100 lux (vs. sunlight ~100,000 lux), posing negligible blue-light risk for retinal damage or macular degeneration, but evening use suppresses melatonin via ipRGCs/melanopsin and delays sleep onset by up to 90 minutes.

Verdict: PROVED - All 5 sub-claims met their verification thresholds (5/5 holding), yielding an overall PROVED verdict. All 12 citations were verified. - Smartphone screens emit 150–625 cd/m² luminance; at typical viewing conditions this corresponds to roughly 80–100 lux at the eye, orders of magnitude below the 32,000–100,000 lux of direct sunlight (SC1, SC2). - Three independent medical authorities (Harvard Health, AAO, PMC peer-reviewed review) confirm negligible retinal risk from screen blue light at consum