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
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