Objective To explore the treatment effects of pan-photocoagulation and para-photocoagulation on patients with diabetic retinopathy. Methods During the time of August 2012 to August 2013,130 diabetic retinopathy patients with 250 retinopathy eyes were selected and divided into group A and group B under the principles of random assignment and voluntary. The 65 diabetic retinopathy patients in group A were treated by pan-photocoagulation while the other 65 diabetic retinopathy patients in group B were treated ...