Modern scientists became interested in studying Bilberry after World War II, when British RAF pilots observed that taking the herb improved their night vision. Today, Bilberry is known to be effective in treating various eye disorders and maintaining healthy vision. Bilberry extract can help the retina to adapt to light and dark, and it is often prescribed to treat night blindness and those with poor adaptation to bright lights. It is also believed to strengthen the capillaries in the eye and may play a role in preventing or treating eye diseases such as retinal disease, cataracts, glaucoma, and macular degeneration.en for treating various eye disorders and maintaining healthy vision. Bilberry extract helps the Retina adapt to light and dark and is often prescribed to treat night blindness and those with poor adaptation to bright lights. It strengthens the capillaries in the eye and may play a role in preventing or treating eye diseases such as retinal disease, cataracts, glaucoma, and macular degeneration.