Complex sentence: He qualified as a medical doctor at Oxford University in 1993 and then researched at institutions in the USA and UK including the UCL Institute of Ophthalmology, Moorfields Eye Hospital and the Wilmer Eye Institute.
Split into simpler sentences: He qualified as a medical doctor at Oxford University in 1993. He then did medical research at several institutions in the USA and UK including: the UCL Institute of Ophthalmology, Moorfields Eye Hospital and the Wilmer Eye Institute.