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Biomechanical consequences of keratoconus treatments
Author(s) -
HUGNY LARROQUE C,
COCHENER B
Publication year - 2013
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2013.s046.x
Subject(s) - keratoconus , ophthalmology , cornea , medicine , visual acuity
Purpose to evaluate, biomecanical consequences of Crosslinking (CXL) in keratocônus, with intracorneal ring (ICR) or not, with a new instrument : Corvis © (Oculus). Methods Our prospective study included ten patients with evolutive keratoconus (i.e. keratometric modification more than 0.5 D and/or refraction modification in 6 months), with pachymetry superior to 400 microns. For patients had both CXL and ICR (operated 3 months after CXL), six CXL only. The procedure was flash CXL (4 minutes of riboflavine, 15 minutes of UltraViolets). Patients were seen at 1, 3 and 6 months, with visual acuity, topography, corvis (deformation amplitude, aplanation length, corneal velocity), vidéotopography. Results The evaluation of corneal biomechanical properties of the cornea with corvis shows, after CXL, an increase of the aplanation lentgh of the second palanation pic : 0,8 pre‐CXL, 1,02 post‐CXL. Now, A2’s length is usually decreased in keratoconus compared to normal cornea. Therefore, the A2 lenght change after CXL could be a parameter for the follow‐up after CXL to show it’s efficacy. Conclusion Corvis can be another tool in keratoconus’ follow‐up, based on the impacts of treatments (ICR and CXL) on biomechanical properties of the cornea.