Complex sentence: The Institute has a staff of around 200, including around 45 principal investigators, and cooperates closely with Moorfields Eye Hospital, with which it is a partner in the Moorfields Eye Hospital/UCL Institute of Ophthalmology NIHR Biomedical Research Centre.
Split into simpler sentences: The Institute has a staff of around 200, including around 45 principal investigators. It cooperates closely with Moorfields Eye Hospital, with which it is a partner in the Moorfields Eye Hospital/UCL Institute of Ophthalmology NIHR Biomedical Research Centre.