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World Health Day 2026

Together for health. Stand with science.

This World Health Day 2026, WHO unites and mobilizes the world under the theme “Together for health. Stand with science.” to highlight the role of science-led innovations in improving health.

In celebration of World Health Day, we are drawing attention to the many ways optics research and technology are used to support global health, with applications spanning enhancing drug delivery, improving surgical techniques and patient care, new medical imaging methods and more.

Optica Biophotonics Congress

Optica Biophotonics Congress

Better 3D and 4D Visualization of Biomedical Images

Better 3D and 4D Visualization of Biomedical Images

3D Biology and Regenerative Medicine: YongKeun Park

3D Biology and Regenerative Medicine: YongKeun Park

Monitoring mental health and emotional states with light

Monitoring mental health and emotional states with light

Better photodynamic therapy for breast cancer

Better photodynamic therapy for breast cancer

Researchers take major step toward cuff-free blood pressure monitoring

Researchers take major step toward cuff-free blood pressure monitoring

OCT for in vivo imaging of cilia dynamics

OCT for in vivo imaging of cilia dynamics

Fiorenzo Omenetto

Silk for global health: Fiorenzo Omenetto

Molecular “Jackhammers” Destroy Cancer Cells

This is the first time a molecular plasmon has been used to excite the whole molecule and to produce mechanical action that achieves a particular goal—in this case, tearing apart the cancer cells’ membrane.

Molecular “Jackhammers” Destroy Cancer Cells

Blue light can aid cornea repair

Blue light can aid cornea repair

Multiphoton microscopy image

Multiphoton microscopy image

Image for keeping the session alive