... long-term illnesses such as heart disease, cancer, and an eye disorder called macular degeneration. Bilberry also contains vitamin C, which ... rhodopsin, a pigment that improves night vision and helps the eye adapt to light changes.Bilberry fruit is also rich in ... for diarrhea. Do not use for more than 4 days. Eye conditions and circulation: 80 - 480 mg a day in 2 ...