Question pour un ophtalmologue

06/05/2026

Les chercheurs ont observé la présence d'un virus marin chez des personnes souffrant d'hypertension oculaire sévère.

19/04/2026

Researchers have taken a major step toward restoring vision by successfully 3D printing a cornea that closely mimics the structure of a real human eye. A team from Pohang University of Science and Technology and Kyungpook National University developed an artificial corneal stroma using a specialized bioink made from decellularized corneal tissue and stem cells. This approach allowed them to recreate the highly organized collagen lattice that gives the cornea its transparency, strength, and flexibility—three properties that are essential for clear vision.

What makes this breakthrough especially important is how the scientists solved one of the biggest challenges in corneal tissue engineering: aligning collagen fibers in the same precise pattern found in a natural cornea. They achieved this by carefully controlling shear stress during the 3D printing process, guiding the collagen fibrils into the correct arrangement. This level of structural accuracy has been extremely difficult to achieve with synthetic materials, which often fail to match the optical clarity and biological compatibility of real tissue.

The advance could have huge implications for global eye care. Millions of people worldwide suffer from corneal blindness, yet donor corneas remain in critically short supply. If this technology continues to progress successfully, bioprinted corneas could one day offer a safer and more accessible alternative to traditional transplants, while also lowering the risk of rejection and improving long-term outcomes for patients.



Source: Biofabrication — Kim, J. H., Kim, K. W., Yun, J. W., & Cho, D. W., “Shear-induced alignment of collagen fibrils using 3D cell printing for corneal stroma tissue engineering.”

16/03/2026

22/02/2026

Tatouages : un danger caché pour vos yeux ? 👀 👉 https://l.science-et-vie.com/zpq

20/02/2026

Interesting

A biological miracle is happening in Elite Clinics where blindness is prevented by plumbing. A pump smaller than a grain of rice is implanted in the eye to drain excess fluid and lower intraocular pressure. It successfully maintained safe pressure levels in 100% of patients for 2 years, preventing optic nerve damage.

This "Smart Shunt" works automatically, adjusting the flow rate based on the eye's needs. It removes the burden of daily eye drops and the risk of patient error, ensuring that glaucoma never progresses to blindness.

18/02/2026

"Il est biologiquement plausible que le psoriasis puisse augmenter le risque de DMLA"
👉 https://l.sciencesetavenir.fr/8zB

17/02/2026

Il existe des verres particuliers pour corriger le strabisme …

14/02/2026

Lors d’une session en direct sur X le 28 janvier 2026, Elon Musk a annoncé que Neuralink prépare pour 2026 les premiers tests humains d’une version avancée de sa puce cérébrale, baptisée « Blindsight », destinée à restaurer la vision chez les personnes aveugles depuis la naissance ou ayant perdu la vue par lésion oculaire mais avec le nerf optique intact.

Selon Musk, la puce, implantée directement dans le cortex visuel, contournerait les yeux et le nerf optique endommagés pour stimuler directement les zones cérébrales responsables de la vision. Les premiers essais animaux sur singes auraient déjà permis une « vision rudimentaire » (formes, contours, luminosité). Il promet une résolution initiale « basse, comme Atari dans les années 80 », mais qui pourrait s’améliorer rapidement grâce aux mises à jour logicielles. Neuralink vise une autorisation FDA pour les essais humains « Blindsight » fin 2026.

14/02/2026

Infection oculaire : une menace pour la mémoire ? 🧠