***TASK***
the task is to simplify the input abstract of a biomedical literature

***INPUT***
the input is the abstract of a biomedical literature

***OUTPUT***
the output is the simplified abstract for the input abstract of a biomedical literature

***DOCUMENTATION***

***EXAMPLES***

Input: We included six trials involving 1438 participants. Three of the six trials had adequate sequence generation while all the trials had unclear allocation concealment There was no evidence of any difference in pain perception during surgery with either retrobulbar or peribulbar anaesthesia. Both were largely effective. There was no evidence of any difference in complete akinesia or the need for further injections of local anaesthetic. Conjunctival chemosis was more common after peribulbar block (relative risk (RR) 2.11, 95% confidence interval (CI) 1.46 to 3.05) and lid haematoma was more common after retrobulbar block (RR 0.36, 95% CI 0.15 to 0.88). Retrobulbar haemorrhage was uncommon and occurred only once, in a patient who had a retrobulbar block. There is little to choose between peribulbar and retrobulbar block in terms of anaesthesia and akinesia during surgery measuring acceptability to patients, need for additional injections and development of severe complications. Severe local or systemic complications were rare for both types of block.
Output:

We set out to compare the two forms of local anaesthesia for cataract surgery. Our review showed that pain control and paralysis of the eye muscles to paralyse movement of the eye ball (akinesia) and allow surgery are no different for the two types of anaesthesia. The need for additional injections of local anaesthetic was higher with peribulbar anaesthesia (four trials). Only one case of bleeding behind the eye occurred and this was with retrobulbar anaesthesia (in one trial). The acceptability of the two methods to patients were similar in the two studies that reported on this outcome. None of the trials reported any life-threatening complications. There was a moderate risk of bias in the included trials.