Objective: Explain changes in peripapillar retinal nerve fiber layer in patients with diabetic retinopathy with criteria to receive panretinal photocoagulation, analyzed by td-oct (stratus) unit.
Material and Methods: A transversal retrospective and observational study was done to study peripapillar nerve fiber layers of 46 eyes from 33 patients using a td-oct (stratus) unit. according to laser application technique, time since application and day of the study, 4 groups of patients were set: the first with patients with less than 30 days since last laser application and day of study. The second with patients with 180 days since laser photocoagulation; the third and fourth groups received panretinal photocoagulation and macular selective laser with an Oct 30 and 180 days after administration of treatment.
Results: The clinically significant finding was in the comparation of the group that received panretinal photocoagulation with oct after 30 days, and the group that received panretinal photocoagulation and oct after 180 days. average thickness was less in the second group, with a statistical significant finding p=0.012 in inferior quadrant.
Conclusion: Administer laser photocoagulation makes changes in retina´s structure and function, there are many different results in accordance to equipment used to apply treatment and to take measurements. the patient must be informed about secondary and adverse effects after the treatment.
Keywords: Diabetic retinopathy; Panretinal photocoagulation; Macular laser; Time-Domain optic coherence tomography; Retinal nerve fiber layer