Macular edema [macular edema] is typically treated with focal laser photocoagulation which aims a laser in the vicinity of the macula to seal the leaking blood vessel. Pan-retinal photocoagulation [pan-retinal photocoagulation], on the other hand, is used to minimize proliferative retinopathy by targeting hundreds of spots across the retina to stop bleeding from the abnormal blood vessels and to prevent their further growth.