Impact of lens thickness on complications of hypermature cataract surgery: A prospective study

To assess the correlation between lens thickness (LT) measured by ultrasonography and duration of surgery as well as complications. The study was conducted in a hospital in the Parisian suburb of Bobigny, France. A prospective and monocentric study was conducted. All patients undergoing surgery for hypermature cataract between January 2013 and March 2014 were included. Morphological features, including LT, axial length, anterior chamber depth and vitreous length were assessed using A-scan ultrasonography. The other parameters assessed were the duration of surgery, occurrence of complications during surgery, visual acuity (VA) and corneal edema score one week after surgery. Thirty eyes of 29 patients were included. Mean LT was 4.11±0.64mm (median: 3.89mm). Mean surgery duration was 24.2±8.7min. Three patients experienced complications during surgery: 2 capsular breaks and 1 posterior lens dislocation. At one week, the mean decimal VA was 0.49±0.34 and the mean corneal edema score was 0.76±1.09. The Pearson correlation coefficient was r=0.27 (P>0.05) between LT and surgery duration while it was r=–0.53 (P=0.01) between VA and LT. No correlation was found for the other parameters studied. In this study, the linear correlation between LT and the surgery duration was low. The visual recovery at day 7 appeared inversely correlated with the LT. LT did not seem to be a marker for longer surgery duration but appeared related to the visual recovery at one week. Évaluer la corrélation entre l’épaisseur cristallinienne (EC) mesurée par échographie et la durée de la chirurgie de cataracte ainsi que les complications chirurgicales. Une étude prospective monocentrique a été menée. Tous les patients opérés de cataracte blanche hypermature entre janvier 2013 et mars 2014 ont été inclus. Les caractéristiques morphologiques comprenant l’EC, la longueur axiale, la profondeur de la chambre antérieure et la longueur axiale du vitré ont été évalués en utilisant l’échographie en mode A. Les autres paramètres évalués étaient la durée de la chirurgie, la survenue de complications pendant la chirurgie, l’acuité visuelle (AV) et l’edème cornéen une semaine après la chirurgie. Trente yeux de 29 patients ont été inclus. L’EC moyenne était de 4,11±0,64mm (médiane : 3,89mm). La durée moyenne de la chirurgie était de 24,2±8,7minutes. Trois patients ont eu des complications pendant la chirurgie : 2 ruptures capsulaires et 1 luxation postérieure du cristallin. À une semaine, la moyenne d’AV