LAUSR

Dear Editor, We agree with Robba et al. [3] who recently reviewed ONSD evaluation for non-invasive ICP estimation in the Journal that most of the clinical data collected so far have shown that ONSD monitoring is a promising but not easy-to-interpret candidate for this purpose. Of course, this and the broad attention meanwhile received in the clinical scene is good news for the method we proposed 25 years ago having performed first ICU bedside measurements in our units and ex vivo studies. However, we would like to point out some earlier reported results and methodological aspects that were not mentioned in the text.