Topographic and Biomechanical Changes after Application of Corneal Cross-Linking in Recurrent Keratoconus

Emilio Pedrotti, Grazia Caldarella, Adriano Fasolo, Erika Bonacci, Nicola Gennaro, Alessandra De Gregorio and Giorgio Marchini
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Emilio Pedrotti: Department of Eye Clinic, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37100 Verona, Italy
Grazia Caldarella: Department of Eye Clinic, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37100 Verona, Italy
Adriano Fasolo: Department of Eye Clinic, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37100 Verona, Italy
Erika Bonacci: Department of Eye Clinic, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37100 Verona, Italy
Nicola Gennaro: Epidemiology Unit, Veneto Region, 35100 Padua, Italy
Alessandra De Gregorio: Ophthalmic Unit, San Bassiano Hospital, 36061 Bassano del Grappa, Italy
Giorgio Marchini: Department of Eye Clinic, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, 37100 Verona, Italy

IJERPH, 2019, vol. 16, issue 20, 1-8

Abstract: Background : Recurrent keratoconus (RKC) develops as a progressive thinning of the peripheral and the inferior cornea after keratoplasty, in both graft and host, causing secondary astigmatism, refractive instability, and reduced visual acuity. We evaluated the effectiveness of corneal cross-linking (CXL) in patients diagnosed with RKC. Methods: Accelerated-CXL via the epi-off technique was performed in15 patients (18 eyes) diagnosed with RKC. Topographic and biomechanical changes were assessed at 12 months. Results : Differences in maximum keratometry, thinnest corneal thickness, and biomechanical parameters (deformation amplituderatio, inverse concave radius, applanation 1 velocity, and applanation 2 velocity, stiffness A1) versus baseline were statistically significant ( p < 0.05).Best corrected visual acuity was improved in 13 eyes and unchanged in 4;manifest refractive spherical equivalent was reduced in 13 eyes, increased in 3,and unchanged in 1 eye; topographic astigmatism was reduced in 9 eyes, remained stable in 1 eye, and increased in 7 eyes. Conclusions : Improved topographic and biomechanic indexes at 1 year after CXL suggest it‘s potential as first-line therapy for RKC, as it is for KC.

Keywords: recurrent keratoconus; corneal cross-linking; corneal ectasia; corvis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
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