Objective of ETDRS study is
Option A - ETDRS study
Option C - DRS study
Option B - DRVS study
Effect of aspirin on the course of diabetic retinopathy
To observe patients with severe DR in type 1 and type 2 diabetes over 2 years to determine visual outcomes
To evaluate whether photocagulation prevents severe visual loss in eyes with diabetic retinopathy
ALL of the above