Central Visual Field Changes after Panretinal Photocoagulation in Proliferative Diabetic Retinopathy

Abstract

This study comprises 53 eyes, divided into two groups A and B, with proliferative diabetic retinopathy which were treated with panretinal photocoagulation (PRP). Its purpose is to investigate the alterations in the central 15° and 30° of the visual field and in each quadrant separately. In both groups A and B, PRP covered the periphery and midperiphery. In group A, it stopped 2 disc diameters (DD) from the upper temporal and lower margin of the fovea including the papillomacular bundle, while in group B, PRP stopped 3 DD from the upper temporal and lower margin of the fovea and 1 DD of the nasal margin of the optic disc. The investigation revealed, in group B after PRP, an improvement of the retinal sensitivity in the central 15° of the visual field (p < 0.01). In the 30° of the visual field a deterioration after PRP was noted in both groups A and B, the deterioration being however much more prominent in group A. Comparing the results between groups B and A after PRP, a difference in the retinal sensitivity in favour of group B at 15° and 30° of the visual field was found. As regards regression of neovascularization and visual acuity, no statistically significant difference has been observed between the two groups.

The 5-Year Onset and Regression of Diabetic Retinopathy in Chinese Type 2 Diabetes Patients

“…As far as we know, no observational population study has reported the systemic factors associated with DR regression in a community population before. Although late stage DR can be contained by photocoagulation, intraocular medicine or vitreoretinal surgery, it is often at the expense of functional retina and visual performance and often results in poor prognoses [20] , [21] . By studying the factors associated with DR regression, we can provide early stage DR patients with more options to not only slow the progression of retinopathy but also to reverse the existing disease, thus avoiding late-stage retinopathy and achieving better prognoses.…”

Macular function assessed with mfERG before and after panretinal photocoagulation in patients with proliferative diabetic retinopathy

“…Most studies of the side effects of panretinal photocoagulation for proliferative retinopathy have focused on subjective parameters such as visual acuity, contrast sensitivity, perimetry, and photostress (11,12). In the cases where objective functions have been studied full-field ERG has been used (13,14).…”

Changes in Peripapillar Retinal Nerve Fiber Layer Analized by Td-Oct in Patients with Diabetic Retinopathy That Receive Panretinal Photocoagulation

“…Secondary effects after photocoagulation in retina have been described, including defects in campimetries from 15 to 30 grades within central vision field, with most of affection if the laser spots are near of peripapillar zone [8]; a thicker central macular area may originates edema, and vitreous hemorrhage [9]; peripheral and night vision loss are significant effects, as well as a decrement in 1 to 4 lines of central vision in 10% of patients, this secondary effect is seen more frequently in patients with high risk criteria, and not so common in persons with epiretinal membrane, cataract, neovascular glaucoma, and macular degeneration [10].…”