Panretinal Photocoagulation for Diabetic Retinopathy With PASCAL Laser

Inclusion Criteria: * proliferative or severe nonproliferative diabetic retinopathy (type 1 or type 2) * best corrected visual acuity of 20/50 or better * capability to read and follow instructions * capability to sign the consignment term Exclusion Criteria: * best corrected visual acuity worse than 20/50 * significant macular edema responsible for visual acuity lower than 20/50 * media opacities (includes vitreous hemorrhage in the visual axis, but not a reabsorbing inferior vitreous hemorrhage) * previous laser treatment (PRP, focal or macular grid) * glaucoma (confirmed or suspicious) * other diseases of the retina and optic nerve * previous ocular surgery in the last 6 months * impossibility to obtain good quality images of retinography, angiography or OCT