Intravitreal Bevacizumab vs Laser vs Combination of Bevacizumab and Modified Laser in PDR

Inclusion Criteria: * Presence of PDR with the indication of full PRP according the intend of investigator * Best corrected visual acuity of 20/320 or better * Media clarity, pupillary dilation and patient's cooperation sufficient for full PRP, wide-field FAG and OCT Exclusion Criteria: * History of prior PRP with more than 100 burns outside the posterior pole * Tractional retinal detachment involving the macula * Evidence of neoplasia of angle on examination * Macular edema due to a cause other than DME * Any ocular condition which may change visual acuity during the study * Substantial cataract which has declined the vision by 3 lines or more * History of intravitreal injection of anti-VEGF agent in past 2 months * History of any use of corticosteroid during past 4 months * History of major intra-ocular surgery except cataract surgery * History of YAG laser capsulotomy during past 2 months * Aphakia and uncontrolled glaucoma according to investigator judgment