Corneal Confocal Microscopy to Detect Diabetic Neuropathy in Children

In phase 1: To compare corneal nerve density (CND), length (CNL), and branching (CBD) by CCM between 1. children with type 1 diabetes for 5 years or more to children without diabetes; 2. children with type 1 diabetes with and without evidence of diabetic neuropathy; 3. to examine the relationship between CND, CNL \& CBD and known risk factors of diabetic neuropathy In phase 2: 1. to examine for changes in corneal nerve morphology two years after the initial CCM exam. 2. to describe the evolution of diabetic neuropathy based on clinical symptoms, neurological deficits, and other tests of nerve dysfunction. 3. to assess if changes in corneal nerve morphology correlate with changes in nerve conduction velocity and autonomic testing. 4. To examine the risk factors associated with progression of diabetic neuropathy in our pediatric population.