Tears are a clear liquid secreted by the lacrimal glands (tear gland) found in the eyes of all land mammals. [1] . Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. [2] . The different types of tears—basal, reflex, and emotional—vary significantly in composition. [2]

2023年4月18日 · Tears are essential to help you see clearly and maintain the health of your eyes. They can also help communicate your emotions. Your body makes three types of tears. Basal tears are in your eyes all the time to lubricate, nourish and protect your cornea.

2022年2月21日 · Your eyes create three different kinds of tears to provoke an emotional response, keep your eyes clean and prevent infection. Wonder why you might be crying more — or less — than other people?

2025年1月10日 · Your eyes produce three types of tears: basal tears, reflex tears and emotional tears. Each type has a different function. Basal tears. Basal tears are responsible for keeping your eyes lubricated. Your eyes constantly release small …

2019年6月24日 · What you might not realize is that tears contain a lot more than just that — and that they serve some very diverse purposes! Let’s take a look at what tears are, how they work, and some...

2019年7月16日 · Tears keep your eyes wet and smooth, and they help focus light so you can see clearly. They also protect your eyes from infections and irritating things, like dirt and dust. Find out what tears are made of and how they protect your eyes.

2017年2月28日 · We have three distinct types of tears: basal tears, reflex tears and emotional tears. Most researchers believe that emotional tears—triggered by strong feelings such as joy and sadness—are unique to humans.