Complex sentence: There was initially some hope of a full recovery and he was named in a provisional England squad for the 2015 Cricket World Cup, but he continued to experience difficulties with his vision and in June 2015, aged 27, announced his retirement from professional cricket.
Split into simpler sentences: There was initially some hope of a full recovery and he was named in a provisional England squad for the 2015 Cricket World Cup, but he continued to experience difficulties with his vision. As a result of these problems, in June 2015, aged 27, he announced his retirement from professional cricket.