Changes in Electroretinogram and Contrast Sensitivity After PASCAL Treatment

Inclusion Criteria: * Patients older than 25 years, with a diagnosis of severe NPDR or PRD. * Good pupil mydriasis (minimum 5mm) With clear media * Patients without previous laser treatment or treatment with antiangiogenic drug. Exclusion Criteria: * Patients who do not accept informed consent. * Patients with clinical macular Edema before treatment. * Significant corneal opacity. * Patients with other eye diseases that interfere with the studies required for the monitoring of patients. * History of refractive surgery, glaucoma or ocular hypertension, intraocular inflammation, choroiditis multifocal, retinal detachment, optic neuropathy (4). * Patients with tractional retinal detachment due to abundant fibrovascular