The Ophthalmic Clinical Trial Training and Certification group at The EMMES Corporation has developed proven solutions for the training and certification of visual function examiners participating in ophthalmic studies. Use of the Early Treatment Diabetic Retinopathy Study (ETDRS) protocols for performing manifest refraction and assessing visual acuity serve as the gold standard in the conduct of ophthalmic clinical trials. The protocols help to assure uniformity of measurements when gathering important outcome data. Study sponsors are assured that personnel at clinical centers are applying protocols correctly.

ETDRS Charts