either of two pairs of mucomembranous folds in the larynx. The upper pair (false vocal cords) are not concerned with vocal production; the lower pair (true vocal cords or vocal folds) can be made to vibrate and produce sound when air from the lungs is forced over them See also glottis related adjective glottal.
Vitamin A drops. Vitamin A eye drops have been found to help provide lubrication for dry eyes and eye drops that contain vitamin A, such as Dakrina, VivaDrops and other over the counter drops with vitamin A added are often preferred to prescription solutions for dry eyes.itamin A eye drops have also been shown to provide treatment for a specific type of eye inflammation called, superior limbic keratoconjunctivitis that affects the cornea and inside of the upper eyelids.
Vitamin A was first discovered in 1913 and today it is known to be important for several health issues. Vitamin A not only contributes to proper cell growth and repair, particularly of skin cells, but is also essential for strengthening night vision, assisting bone growth, and regulating the immune system. A deficiency of Vitamin A can lead not only to dry skin but also to dry hair, broken fingernails, and dry eyes.