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You retain all the usual rights of an NHS patient. The University of Oxford, which is sponsoring the trial, has appropriate insurance in place in the unlikely event that you suffer any harm as a direct consequence of your participation in the trial. If you have a concern about any aspect of the trial you can speak with the LENS researchers. They can be contacted on a 24-hour Freephone number: 0808 164 5090 or you may contact the University of Oxford Clinical Trials and Research Governance (CTRG) office on 01865 572224 or the head of CTRG, email If you remain unhappy and wish to complain formally, you can do this through the NHS Complaints Procedure. Details can be obtained from the Patient Advice and Support Service (however, this service is unable to provide information about this trial) at:

the lens trial is now closed

Thank you for your interest in this trial. Our aim is to make your participation an interesting and worthwhile experience, while helping us and others to improve the treatment of people who have diabetic retinopathy. If you have any further questions that have not been addressed within this section, please contact us:

  • 24-hour Freephone: 0808 164 5090