Definition of constraint in the AudioEnglish.org Dictionary. Meaning of constraint. What does constraint mean? Proper usage and audio pronunciation (and phonetic transcription) of the word constraint. Information about constraint in the AudioEnglish.org dictionary, synonyms and antonyms.
Ensures Healthy Eyes: Vitamin A can aid in improving vision. It enables your eyes to adjust to light changes, keeps the eyes moist, and also improves night vision. It can prevent many conditions like dry eyes as well. It helps in the formation of visual purple in the eyes, which can improve the vision of weak eyes.
The Roles of Vitamin A. Vitamin A is much more than just a vitamin that helps you see at night. It is a fat-soluble vitamin that plays a role in immunity, the body's development and maintenance of major organs. Available in two sources, vitamin A is derived from animals and from plants. Vitamin A from animal sources is preformed vitamin A and is active immediately. From plant sources, it is provitamin A â including a group of carotenoids, such as beta-carotene.