Sleep disturbances are related to decreased transmission of blue light to the retina caused by lens yellowingLine Kessel, Galatios Siganos, Torben Jørgensen and Michael LarsenSleep 34, 1215–9 (2011). DOI: 10.5665/SLEEP.1242Linksdx.doi.orgFull text on PubMed: PMC3157663PMID: 21886359Google Scholar