Tears based on different emotions have distinct molecules, all of which can look different when analyzed under a microscope.

For basal tears, subjects were instructed to keep their eyes open while looking into a large ventilator. This dried their eyes out and naturally produced tears.

She put dried tears from all different kinds of situations under the microscope to see what’s different between them all. So there are three different types of tears.

Did you know that your tears have a different structure depending on why you shed them? Rose-Lynn Fisher started a project called "Topography of Tears" where she took dried human tears and looked ...

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Mikkers captured the tears of his friends with a micropipet, and dispensed the teardrops onto a microscopic slide.

Basal tears are released continuously in tiny quantities (on average, 0.75 to 1.1 grams over a 24-hour period) to keep the cornea lubricated.

Clearly, there’s more to tears than meets the eye. In a new study published in Clinical Proteomics, BYU professor of biochemistry Kenneth Christensen and former grad student Robert Roden detail a ...

Basal and reflexive tears, alongside the tear film, are important to ocular health. These types of tears protect the eye from infection and foreign bodies via proteins and immunoglobulins.

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These are primarily basal tears, which shed constantly, rather than emotional and reflex tears made in response to stimuli. However, this volume can vary significantly depending on what you're doing.