ArticleJapanese journal of ophthalmology2026
Corneal biomechanical and tomographic outcomes following accelerated cross-linking in keratoconus: a focus on cone localization.
Article in Japanese journal of ophthalmology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo evaluate the biomechanical and tomographic characteristics of keratoconic corneas undergoing accelerated cross-linking (CXL) for over one year and to assess the impact of cone localization on postoperative biomechanical behavior. STUDY
designProspective-comparative.
methodsThis study included 68 eyes of 68 patients with progressive keratoconus. Based on cone location, the patients were divided into two groups: group 1 (central cone; 34 eyes) and group 2 (paracentral cone; 34 eyes). Scheimpflug imaging was used to assess the corneal thickness, anterior and posterior Kmean, Kmax, and astigmatism. The Ocular Response Analyzer (ORA) measures corneal compensated intraocular pressure (IOPcc), Goldmann-correlated pressure (IOPg), corneal hysteresis (CH), and corneal resistance factor (CRF). All the baseline measurements were repeated at 1, 6, and 12 months. Demarcation line (DL) depth was assessed at 1 month using anterior segment optical coherence tomography. Best corrected visual acuity was recorded at each visit.
resultsAt 1year, anterior Kmean, posterior Kmean and Kmax showed significant reductions (p < 0.01). No significant differences in CH or CRF changes were found between the central and peripheral cones (p = 0.22, p = 0.33). Visual improvement and reduction in spherical equivalent were greater in the central cone group (p = 0.03, p = 0.03). DL depth correlated positively with CH and CRF at 1 month (p = 0.02, p = 0.008), but not at 1 year.
conclusionAccelerated CXL improves corneal shape, but may not produce detectable changes in ORA-derived biomechanics. Regional stiffening may not be captured by global indices, and the cone location appears to be more influential on visual recovery than biomechanical parameters.
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