Under the Microscope: Tears of Joy and Tears of Sadness In 2013, American photographer Rose-Lynn Fisher used an electron microscope to capture the structure of 100 different human tears.

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Tears reveal more than emotions—they offer clues about your health, signaling stress, disease, and medication effects early.

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KEY TAKEAWAYS BYU researchers developed contact lenses to collect tears for health insights. The lenses capture basal tears, providing indicators of diseases like Alzheimer's and macular degeneration.

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 ...

Practically any creature that has eyeballs produces two sets of tears: basal and reflex. Basal tears keep the eye moist, while reflex tears are meant to protect the eye from irritants like dust.

Epithelial basement membrane dystrophy (EBMD), also known as anterior basement membrane disease or map-dot-fingerprint dystrophy, is a common condition that affects the cornea of the eye (the clear, ...

Basal tears help prevent conditions such as dry eye syndrome. You produce fewer basal tears as you get older, so dry eyes are more common in older people, especially women after menopause.

Basal tears are the tears that our lacrimal glands produce to keep the eyes moist and lubricated. They help maintain a smooth surface on the cornea and protect against irritants. They prevent the ...

In contrast to basal tears which are mostly saline, reflexive tears contain high levels of antibodies to help protect the eye from infection (American Academy of Ophthalmology).