- Eyes without a history of panretinal photocoagulation treatment, but that do not have high-risk proliferative diabetic retinopathy characteristics (i.e. these are eyes that have early proliferative diabetic retinopathy that are not yet at a high-risk for vitreous hemorrhage and tractional retinal detachment such that panretinal photocoagulation laser may be deferred). (Group 2 - maximum 5 eyes enrolled with these characteristics)