They say your eyes show your age. There appears to be some truth to this adage when considering the biochemical processes in the human lens, the part of the eye critical for focusing light onto the retina. The lens contains a highly ordered and tightly packed arrangement of crystallin proteins which, if perturbed, leads to cataract and eventual blindness. Since crystallin proteins have a very low turnover, the eye lens provides a model for studying protein ageing. My research aims to identify the key mechanisms underlying cataract formation by exploring the age-related modifications that occur to the crystallin proteins throughout our lives.