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.
Why do people take vitamin A? Topical and oral retinoids are common prescription treatments for acne and other skin conditions, including wrinkles. Oral vitamin A is also used as a treatment for measles and dry eye in people with low levels of vitamin A. Vitamin A is also used for a specific type of leukemia. Vitamin A has been studied as a treatment for many other conditions, including cancers, cataracts, and HIV. However, the results are inconclusive. Most people get enough vitamin A from their diets.