Eye Care for Intensive Care Patients

All studies were categorised according to the strength of the evidence based on the following revised classification system. Level I Evidence obtained from a systematic review of all relevant randomised controlled trials. Level II Evidence obtained from at least one properly designed randomised controlled trial. Level III.1 Evidence obtained from well designed pseudo-randomised controlled trials (alternate allocation or some other method). Level III.2 Evidence obtained from comparative studies with concurrent controls and allocation not randomised (cohort studies), case-control studies or interrupted time series with a control group. Level III.3 Evidence obtained from comparative studies with historical control, two or more single arm studies, or interrupted time series without a parallel control group. Level IV Evidence obtained from case series, either post-test or pre-test and post-test. This Information Sheet Covers the Following Concepts: