Li Shiming suffered from a congenital cataract. His vision has been gradually degenerating over the years.
李世明患有先天性白内障。这些年来,他的视力已逐渐退化。
英语百科
Congenital cataract
The term congenital cataract refers to a lens opacity present at birth. Congenital cataracts cover a broad spectrum of severity: whereas some lens opacities do not progress and are visually insignificant, others can produce profound visual impairment.