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New technique detects microscopic diabetes-related eye damage
Date:4/17/2014

BLOOMINGTON, Ind. -- Indiana University researchers have detected new early-warning signs of the potential loss of sight associated with diabetes. This discovery could have far-reaching implications for the diagnosis and treatment of diabetic retinopathy, potentially impacting the care of over 25 million Americans.

"We had not expected to see such striking changes to the retinas at such early stages," said Ann Elsner, professor and associate dean in the IU School of Optometry and lead author of the study. "We set out to study the early signs, in volunteer research subjects whose eyes were not thought to have very advanced disease. There was damage spread widely across the retina, including changes to blood vessels that were not thought to occur until the more advanced disease states."

These important early-warning signs were invisible to existing diagnostic techniques, requiring new technology based on adaptive optics. Stephen Burns, professor and associate dean at the IU School of Optometry, designed and built an instrument that used small mirrors with tiny moveable segments to reflect light into the eye to overcome the optical imperfections of each person's eye.

"It is shocking to see that there can be large areas of retina with insufficient blood circulation," he said. "The consequence for individual patients is that some have far more advanced damage to their retinas than others with the same duration of diabetes."

Because these changes had not been observable in prior studies, it is not known whether improved control of blood sugar or a change in medications might stop or even reverse the damage. Further research can help determine who has the most severe damage and whether the changes can be reversed.

The study, "In vivo adaptive optics microvascular imaging in diabetic patients without clinically severe diabetic retinopathy," was published in the journal Biomedical Optics Express. It is available at '/>"/>

Contact: Tracy James
traljame@iu.edu
812-855-0084
Indiana University
Source:Eurekalert  

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