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The Poultry Industry Development Association pointed out the ability of the egg yolk to protect eye health and maintain the strength of vision, as the egg yolk provides vitamin A and the two carotenoids: lutein and zeaxanthin as antioxidants and zinc in an abundant amount..
Vitamin A plays an important role in the accuracy of seeing the full spectrum of light, as the eye needs to produce certain pigments for the retina to function properly, and a lack of vitamin A leads to a halt in the production of these pigments, which causes night blindness..
The eye also needs vitamin A to nourish other parts of the eye, as vitamin A protects the cornea, the surface of the eye, and when it is lacking, the eye cannot produce enough moisture to keep it properly hydrated.
As for lutein and zeaxanthin, they are considered powerful antioxidants that play the role of natural resistance to protect eye cells against free radical damage – they are free atoms of atomic oxygen and others, as metabolic products and cell activity – that attack the DNA inside the cell nucleus and then cause aging and death cell.
So, lutein and zeaxanthin reduce the chance of age-related eye diseases such as macular degeneration and cataracts, in addition to zinc, which helps in accurate vision at night and also contributes to the health of the retina, which is the back of the eye..
Nutrition research confirms that the body does not naturally produce lutein and zeaxanthin, so these research recommends eating egg yolks as the most important foods rich in these antioxidants to meet the needs of the body..
The American Academy of Ophthalmology confirms that vitamin A deficiency is the main cause of blindness in children, as statistics estimate that approximately 250,000 to 500,000 children become blind each year due to vitamin A deficiency. Unfortunately, half of these children die within a year of losing their sight..
Egg yolk is a rich source of all vital elements for eye health, as each 100 gm contains vitamin A 1,442 IU, lutein 612 mcg and zeaxanthin 546 mcg.
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