Bilateral cataract formation via acute spontaneous fracture of the lens following treatment of hyperglycemic hyperosmolar syndrome.

Purpose: Acute development of cataracts that may be transient is known to occur during correction of diabetic ketoacidosis and hyperglycemic hyperosmolar syndrome. Nettleship in 1885 was the first to describe the presence of a transient cataract in three diabetic patients that grew worse and eventually cleared with treatment.1 We present a case of irreversible cataracts formed by nuclear fracture of the crystalline lens after hyperglycemia correction, an entity that has not yet been described.

Observations: A 67 year-old Caucasian man presented with sudden bilateral vision loss one week after a week-long hospitalization in the intensive care unit for correction of hyperglycemia in the setting of hyperglycemic hyperosmolar syndrome requiring an insulin drip. This was caused by spontaneous fractures of the lens nuclei causing bilateral irreversible cataracts. The patient underwent uncomplicated bilateral cataract extraction resulting in restoration of normal vision.

Conclusions and importance: Acute transient cataracts that develop during correction of hyperglycemic hyperosmolar syndrome are thought to result from osmotic lens swelling. In this case report, internal fracture of the lens was produced by mechanical forces generated in the process of lens swelling occurring as a consequence of initial hyperglycemia and its subsequent correction. This case represents a rare ocular complication of hyperglycemia correction, and provides new evidence that mechanical forces can be part of diabetic cataractogenesis.