Surface nerves in mouse corneas continually remodel
Live imaging in mice of both sexes tracked the same corneal region from the third week after birth to almost two years, revealing stable deeper nerves.
Limit: Effects on corneal sensation or eye health were not reported
Edited by Boris Djordjevic · AgingResearch.News
In an animal experiment, researchers studied genetically modified mice of both sexes whose pain-sensing nerve fibers in the cornea—the clear front surface of the eye—carried a fluorescent label. They used a high-resolution microscope to repeatedly image the same corneal region from the third week after birth until almost two years of age.
The nerve network closest to the surface and its endings continually remodeled, with individual nerve fibers changing over time. By contrast, nerves in the cornea’s deeper supporting tissue remained remarkably stable. The researchers also observed a decrease in the area covered by corneal nerve fibers as the mice aged.
Why it matters
Corneal nerves support protective reflexes and help maintain the eye’s surface. Long-term imaging offers a way to investigate how these nerves are maintained as the cornea ages.
Caveats
These observations came from genetically modified mice, not people. The abstract does not report whether declining nerve coverage affected corneal sensation or eye health.
The paper
Centre National de la Recherche Scientifique; Lyon 1 Université
The Journal of Neuroscience, May 14, 2026, Open access
