Analysis of Ocular Cyclotorsion in Lying Position after Peribulbar Block

Abstract

 In our study we evaluated the degree of cyclotorsion after peribulbar block and it was located around 5.77 degrees of incyclotorsion (62%), and 5.06 degrees of excyclotorsin (32%), with mean of cyclotorsion located around 5.20 degrees.  We observed in our study that cyclotorsion ranging (1-5) degrees occurred in 27 eyes (48%) and cyclotorsion more than 5 degrees occurred in 23 eyes (46%).  These results lead us to suggest that, despite the apparent akinesia achieved with peibulbar block, the cyclotorsion persists.  Positional induced inexcyclotorsion could be an important factor concerning of astigmatism in refractive surgery.  Before performing refractive and cataract surgery correcting astigmatism, the axis of astigmatism is usually measured in sitting position, while the procedure of correction itself takes place in a supine position.  The refractive outcome of the cylinder correction depends on the accuracy of the axis treatment. Even minimal meridional errors can have significant negative refractive consequences, particularly in cases of moderate to high astigmatism.