Shan, 39,had been blind since the age of 10, after a rare allergic reaction to the sulphur content in antibiotics he was taking damaged his corneas -- the clear membranes that cover the irises at the front of the eyes and protect them from damage.

• 39岁的杉恩10岁时吃了含有硫磺的抗生素产生极罕见的过敏反应，破坏了眼角膜（覆盖于虹膜上保护其免遭破坏的透明薄膜），导致双目失明。