Eating foods rich in Vitamin A can contribute to maintaining healthy eyes. Oranges are a decent source of Vitamin A, which along with other bioflavonoid compounds help to protect the eyes from macular degeneration, cataracts and even blindness due to deterioration of vision. When oranges are added to the diet, they can offer adequate protection to the membranes lining the eyes and may be useful in promoting vision and maintaining eye health for years.Maintenance of the teeth and the gums should be a top priority when it comes to taking care of the mouth, as infectious agents can attack the gum and gain easy entry into the blood supply. Citrus fruits like Orange help promote healthy gums by strengthening the blood vessels and tissues that hold the gums and teeth, and also uses Vitamin C to reduce gum inflammation. The disease scurvy, characterized by bleeding gums and poor healing of wounds, is aggravated by diminished collagen production, caused by vitamin c deficiency.