Laser treatment for retinal vascular diseases

To obtain a clinically adequate laser lesion one must adjust four variables, namely treatment spot size, duration of application, wavelength, and power. The intensity of the necessary reaction will depend upon the type of disease and lesion being treated. When retinal vascular diseases are treated using the laser, the pattern of laser lesions is determined by the morphology, type, and distribution of the retinal vascular disease. This pattern varies from focal and multifocal direct treatment to ablative techniques from one to four quadrants and maximally four quadrants and treatment within the temporal retinal vascular arcades usually avoiding treatment within the papillomacular bundle.