1 Clean your brush and use clean water or a second color to paint inside the outline, being sure to blend with the outer color. 2  Leave the middle white. 3  For a dark center, paint it in once the flower has dried.  For a light center, paint it while the flower is still wet to blend.
The main function of vitamin A is to support vision, especially in dim lighting, by creating pigments that are needed to help keep the retina of the eye healthy. It also helps produce the protein rhodopsin, which absorbs light in the retina. In addition, vitamin A helps support the growth and development of the cornea and other membranes of the eye.
Vitamin A is an essential nutrient, which means that our bodies cannot create it and we must obtain it from our diets or supplements. Vitamin A is perhaps most well-known for its importance to our vision, but is also vital to other body systems and functions.itamin A & Beta-carotene. In addition to vitamin A, there are dozens of other nutrients--called carotenoids--that are converted into vitamin A in the body and therefore have vitamin A activity.. The best known of these carotenoids is beta-carotene.