“…It is difficult to compare the various studies because of wide variations in follow up and assessment of nerve function. Nerve damage does not occur at a fixed time point, but may occur during many stages of the surgical procedure 17,38,40,47,60,61,67,71,86,88 . A close correlation between increasing age and frequency of permanent neurosensory deficit following BSSO is reported in many studies 7,61,62,64,77,95,104 .…”