A study published earlier this year in The Journals of Gerontology found that staring at a deep red light (of a specific wavelength) for three minutes a day can significantly improve declining eyesight that comes as a result of the ageing process. Over 40, our vision starts to decline and our retina starts to age. Our retina’s photoreceptor cells are rich in mitochondria as they have high energy demands. Subsequently, this results in the retina ageing faster than other organs in the body and losing most of its photoreceptor function over life. To try to prevent or delay this natural phenomenon, Professor Jeffery and his team at University College London (UCL) focused on the sensitivity the retina’s photoreceptors. Photoreceptors are made up of cones which mediate colour vision and rods which provide peripheral vision and adapt vision in low/dim light. They recruited 24 people (12 male, 12 female) aged between 28 and 72 who had no ocular disease. They were all tested for the sensiti...