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: Why It's Important. Vitamin A is commonly known as the vitamin needed for good eyesight. Along with promoting vision, vitamin A is also vital for regulating genes, maintaining healthy skin, supporting the immune system and producing red blood cells.itamin A is also needed for the formation and activation of white blood cells. Vitamin A Is Important for Red Blood Cell Production. All blood cells are developed from stem cells. Vitamin A facilitates the specialization of stems into red blood cells.