Vitamin E is an important component of good general health. It has many benefits and is one of the fat soluble vitamins along with A, D and K. It exists in 8 different forms and the most active form in humans is alpha-tocopherol.

Taking the correct amount of Vitamin E is as important as a deficiency. Over dosing can result in hemorrhages and lead to stroke. Some of the more common sources of it are nuts, sunflower seeds, oils, green leafy vegetables, and some grain products. The normally recommended intake of Vitamin E is 22.4 IU or 15 mg for an average male adult. Lactating women should take about 19 mg.

Vitamin E is important in maintaining cell membrane integrity and also helps in producing Vitamin A from oxidation. It also is a key part in the proper functioning of the circulatory system and red blood cell production. In addition, it is key in the body's use of Vitamin K with regard to the clotting factor.

With regard to the eyes since it limits the production of free radicals, it can delay and even prevent development of chronic diseases such as age related macular degeneration and cataracts. Furthermore, in combination with Vitamin A it promotes corneal healing with trauma and refractive surgery. It also helps maintain a stable tear film reducing dry eyes and its' symptoms.

Vitamin E is in high concentrations in the photoreceptors in the back of the eye and further helps protect them from oxidative damage. It must be noted that Vitamin E supplements should be avoided in Retinitis Pigmentosa patients as there is some evidence that it actually may reduce vision at a faster rate then in patients that did not take additional Vitamin E. There is no solid evidence to support this claim, but clinical findings suggest that avoidance is recommended. Vitamin E has been suggested in the treatment of macular edema and certain cases as well.

Vitamin E deficiency is rare in adults, but can be found in individuals with protein transfer disorders, fat metabolism and mal-absorption diseases, as well as Crohn's Disease, Ulcerative Colitis and cystic fibrosis. It's deficiency will affect the retina by decreasing nerve fiber impulse transmission causing muscle weakness. Excessive intake can result in death due to hemorrhages and stroke.

A well balanced diet should give most adults enough Vitamin E, but if one does not eat well then a vitamin E supplement is important in maintaining good over all and ocular health.