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Diabetic Retinopathy and Visual Function Study

NCT00001346 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 100

Last updated 2008-03-04

No results posted yet for this study

Summary

The purpose of this study is to evaluate possible mechanisms of central visual loss in patients with diabetes mellitus. The visual loss of interest to be investigated is that associated with macular edema (prior to and following laser photocoagulation treatment) and that associated with panretinal photocoagulation. The evaluation will be performed with psychophysical testing, i.e., static perimetry and contrast sensitivity function. Of particular interest, the mechanisms of visual loss associated with macular edema (prior to and following laser photocoagulation) will be further investigated. Photoreceptor-mediated visual loss will be assessed by measurements of the Stiles-Crawford effect. Visual loss mediated by post-receptoral retinal changes will be assessed by measuring the Westheimer spatial desensitization/sensitization effect.

Conditions

Sponsors & Collaborators

  • National Eye Institute (NEI)

    lead NIH

Eligibility

Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
1992-11-30
Completion
2000-10-31

Countries

  • United States

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00001346 on ClinicalTrials.gov