Journal
DIABETES CARE
Volume 36, Issue 11, Pages 3646-3651Publisher
AMER DIABETES ASSOC
DOI: 10.2337/dc13-0193
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Funding
- National Institutes of Health [R1-05991]
- Juvenile Diabetes Research Foundation International [27-2008-362]
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OBJECTIVETo establish if corneal nerve loss, detected using in vivo corneal confocal microscopy (IVCCM), is symmetrical between right and left eyes and relates to the severity of diabetic neuropathy.RESEARCH DESIGN AND METHODSPatients (n = 111) with type 1 and type 2 diabetes and 47 age-matched healthy control subjects underwent detailed assessment and stratification into no (n = 50), mild (n = 26), moderate (n = 17), and severe (n = 18) neuropathy. IVCCM was performed in both eyes and corneal nerve fiber density (CNFD), branch density (CNBD), and fiber length (CNFL) and the tortuosity coefficient were quantified.RESULTSAll corneal nerve parameters differed significantly between diabetic patients and control subjects and progressively worsened with increasing severity of neuropathy. The reduction in CNFD, CNBD, and CNFL was symmetrical in all groups except in patients with severe neuropathy.CONCLUSIONSIVCCM noninvasively detects corneal nerve loss, which relates to the severity of neuropathy, and is symmetrical, except in those with severe diabetic neuropathy.
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