Document Detail


Comparative regional pupillography as a noninvasive biosensor screening method for diabetic retinopathy.
MedLine Citation:
PMID:  23154459     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: We describe infrared regional pupillometry as an objective comparative assessment of midperipheral to central retinal sensitivity and to correlate with midperipheral retinal ischemia in diabetic subjects.
METHODS: We tested 12 normal and 17 diabetic subjects using bilateral infrared pupillometry. The diabetic cohort included seven subjects without, five with mild, three with moderate, and two with severe non-proliferative diabetic retinopathy (NPDR). Central and annular stimuli of varying intensity were presented to one eye, and pupillary amplitude and constriction velocity were measured from both eyes. Light stimulus of increasing intensity was presented as 20 consecutive trials (stimulus duration of 300 ms with 3000 ms intervals). The ratio of central to peripheral responses (Q values) was calculated for each stimulus configuration. Average responses with respect to the stimulus strength were regressed with Gompertz sigmoid function.
RESULTS: Control and moderate/severe NPDR cases comparison showed statistically significant differences in amplitude (Q(A)) and constriction velocity (Q(CV)) (Wilcoxon rank sum test P = 0.002, respectively). Age difference for these groups was not statistically significant (Wilcoxon rank sum test P = 0.15). The comparison of control and diabetic subjects without NPDR/mild NPDR was statistically significant for Q(A) and Q(CV) (Wilcoxon rank sum test P = 0.0002 and P = 0.001, respectively). Q(A) and Q(CV) differences were statistically significant between moderate/severe NPDR cases and subjects without or mild NPDR cases (Wilcoxon rank sum test P = 0.013).
CONCLUSIONS: Q(A) and Q(CV) values correlated highly with the severity of diabetic retinopathy, but not with the duration of diabetes.
Authors:
Maria Carolina Ortube; Alexander Kiderman; Yakov Eydelman; Fei Yu; Nelson Aguilar; Steven Nusinowitz; Michael B Gorin
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Multicenter Study; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2013-01-02
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  54     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-01-03     Completed Date:  2013-02-21     Revised Date:  2014-01-06    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9-18     Citation Subset:  IM    
Data Bank Information
Bank Name/Acc. No.:
ClinicalTrials.gov/NCT01546766
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MeSH Terms
Descriptor/Qualifier:
Aged
Aging / physiology
Biosensing Techniques*
Diabetic Retinopathy / diagnosis*
Diagnostic Techniques, Ophthalmological*
Eye Movements / physiology
Female
Fixation, Ocular / physiology
Fluorescein Angiography
Humans
Infrared Rays
Light*
Male
Middle Aged
Pupil / radiation effects*
Reflex, Pupillary*
Grant Support
ID/Acronym/Agency:
5R44EY018025-03/EY/NEI NIH HHS; P30 EY000331/EY/NEI NIH HHS
Comments/Corrections

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