ETDRS visual acuity chart

Early Treatment of Diabetic Retinopathy Study visual acuity chart (physical object)

active

Code	`400914004`
Semantic tag	physical object
Module	international
Definition	primitive
Effective time	20030731

Synonyms

ETDRS chart
Early Treatment Diabetic Retinopathy Study chart
Early Treatment of Diabetic Retinopathy Study (ETDRS) visual acuity chart
Early Treatment of Diabetic Retinopathy Study visual acuity chart

Parents (1)

400912000Visual acuity test equipment physical object

Children (0)

None (leaf concept).