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Patterned CXL. (a–c) UV light pattern used for localized CXL treatment. (d–f) Corresponding strain maps of the mid-stroma (approx. 55% depth). Negative strains indicate compression and positive strains elongation along the vertical axis. Black lines indicate the frontier between irradiated and non-irradiated areas. Size bars have a dimension of 1 mm axially and laterally. (Online version in colour.)
