Cortical cataracts are most often seen as whitish spokes peripherally in the lens, separated by fluid. Vacuoles and water clefts can also be seen in these lenses. Posterior sub-capsular cataracts are due to the migration and enlargement of lens epithelial cells (Wedl cells) posteriorly. Diabetes mellitus is a major factor in the formation of this type of cataract. Osmotic stress due to sorbitol accumulation has been linked with sudden worsening in patients with uncontrolled hyperglycaemia. However, research has also found that when sorbitol dehydrogenase was blocked, preventing sorbitol accumulation, oxidative stress was connected with slow-developing cataracts. [5]