Humans consist of trillions of cells – the basic unit of life on earth.
They function on their own, creating their own energy and are self-replicating.
Mitochondria are referred to the powerhouses of the cell. They turn the energy we take from food for the cells in our bodies to use. They generate the majority of our cell energy – adenosine triphosphate (ATP).
Mitochondria influence the pace of ageing.
A decline in mitochondrial quality and activity has been linked with normal ageing and the development of a wide range of age-related diseases.
Ageing causes decreased skeletal muscle and mitochondrial function.  This can lead to a 25–30% reduction in functional capacity between ages 30 years and 70.

In humans around 40 years-old, cells in the eye’s retina begin to age, and the pace of this ageing is caused, in part, when the cell’s mitochondria, whose role is to produce energy (known as ATP) and boost cell function, also start to decline.
Mitochondrial density is greatest in the retina’s photoreceptor cells, which have high energy demands. As a result, the retina ages faster than other organs, with a 70% ATP reduction over life, causing a significant decline in photoreceptor function as they lack the energy to perform their normal role.
The retina’s photoreceptor population is formed of cones, which mediate colour vision, and rods, which provide peripheral vision and adapt vision in low/dim light

Visual contrast sensitivity is a measure of the ability of the visual system to distinguish objects from the background.
Tests usually involve the presentation of letters or digits that are adjusted to become increasingly similar in brightness to the background until they can no longer be seen

The science related to this product is based on the following report:

Shinhmar, Grewal, Sivaprasad, Hogg, Chong, Neveu & Jeffery. Optically Improved Mitochondrial Function Redeems Aged Human Visual Decline. The Journals of Gerontology: Series A, Volume 75, Issue 9,

Light-emitting diode (LED) sources are unique in that they emit a narrow spectrum of light.
Research on LED mechanisms has yielded multiple pathways by which clinical benefit is achieved. LEDs appear to affect cellular metabolism by triggering intra-cellular photobiochemical re-actions.
Observed effects include increased ATP, modulation of reactive oxygen species, the induction of transcription factors, alteration of collagen synthesis, stimulation of angiogenesis, and increased blood flow.

There are many red flashlights available for sale on the internet and in stores.
However, most of these do not supply the correct wavelength as required.
Not all wavelengths of light are equally visible, or equally effective at stimulating human vision, due to the spectral sensitivity of the human eye; radiation in the infrared and ultraviolet parts of the spectrum is useless for illumination. The luminous efficacy of a source is the product of how well it converts energy to electromagnetic radiation, and how well the emitted radiation is detected by the human eye.
Lumen measures total light within the range of human visual response. It tells us nothing about the distribution of that light energy over the electromagnetic spectrum. The energy required for these tests is not measured in lumens
The lens through which the light is projected is clear and this means that the eye could be looking directly at a small point source, which could lead to damage.
The intensity of the light in flashlights is maximised to throw a beam as far as possible. Very often there is too much light – more is not always better.
Flashlights often come with a zoom capability, which means that the intensity can change from use to use if it is not fixed in position to create a standard reference output.