About Anthocyanin's effects

As it is generally known, Anthocyanin that is a pigment composition of bluish purple in blueberry (bilberry) is effective for eyestrain.

In the eyeball, the cornea and the crystalline lens that does the role of lens exist. Cornea helps to refract light to be focused on the retina through crystalline lens. Retina have photosensitive cell which react to light, and conduct signals to the brain, and you see things.

In the cells react light, there are pyramidal cells which react in bright points and rod cells which react in dark points. Rod cells have a plastid named Rhodopsin linking with protein. The rhodopsin is taken apart on getting stimulation of light and recombined. The repetitions of the degradation and recombination change the information of light to electric signals. It conducts to the brain and you see things.

When the recombination of Rhodopsin is not working, you get eye strain. The preventive measure is keeping the recombination of Rhodopsin.

That's when Anthocyanin really comes into play. Anthocyanin excites the recombination of Rhodopsin and prevents and remedies eyestrain.

Also, Anthocyanin helps the works of pupil and crystalline lens.

Pupils control the amount of light into eyeballs, but tired eyes tighten pupils, so that in dark points have difficulty seeing. And crystalline lens focuses by changing the thickness. If this function does not work, it cause myopia, hyperopia and astigmatism.

Anthocyanin is confirmed that it keeps the pupil's works normal and remedies eye's trouble such as myopia. It's thought that it is the result to remedy the blood circulation of ciliary body which control the works of pupil and crystalline lens.

The blood vessels around eyes do the role to carry oxygen and nutrition to various areas in eyeballs. However, these blood vessels are easy to be damaged by active oxygen from ultraviolet, then it impairs the blood circulation and stops carrying oxygen and nutrition, it contributes to eye's troubles.

Anthocyanin by the powerful antioxidant action prevents from damage of active oxygen, protects blood capillary, extends blood vessels and controls agglutination of platelets, with that, remedies the blood circulation. Also, when blood circulation of ciliary body is good, it supplies sufficient nutrition to the liquid named "aqueous humor"

which supply cornea and crystalline lens nutrition, so that it remedies eye's works. Though several actions to eyes have gotten a lot of attention, the powerful antioxidant action can expect to work for another places, too.

Besides as possible actions, there are the actions of strengthening blood vessels and collagen fibber, controlling agglutination of platelets, preventing adult disease and infection of the urinary tract, stimulating combination of collagen, and antiulcer action.

Collagen exists mainly in crystalline lens and cornea, and it helps to safeguard health of eyes and to reduce aging.