The blueberry is a perennial shrub with a height 60-90cm and dense branching. It is cultivated as self-planted, usually isolated in temperate and cold regions of the earth, in the high mountains of tropical regions. Although the effect of blueberry for improving the night vision has not been found yet, laboratory studies in rats have provided preliminary evidence that eating blueberry may suspend or reverse ocular disorders such as related macular degeneration.