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. 2026 Sep 10;13:1853734. doi: 10.3389/fmed.2026.1853734

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© 2026 Zhang, Alió del Barrio, Bao and Alió.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Clinical slit-lamp photograph showing corneal allogeneic intrastromal ring segments (CAIRS) implanted within the corneal stroma in an eye with keratoconus. The image illustrates the intrastromal position and appearance of the allogeneic corneal tissue segments used for corneal regularization. — Corneal allogeneic intrastromal ring segments.