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.
Vitamin A has many roles in health: normal vision, bone and tooth formation, cell function, and immunity. The carotenoids act as antioxidants. Vitamin A works in the lining of your lungs to help fight infection. It also helps to keep your intestines healthy. Not getting enough vitamin A can lead to night blindness. This means your eyes do not adjust when going from a lighted area to a dark area, such as when entering a dark movie theater.