title: Should 30 letters be added to the 4 m visual acuity score on the Early Treatment Diabetic Retinopathy Study Chart?
authors: Centre for Ophthalmology and Visual Science, The University of Western Australia, Perth, Western Australia, Australia.|Lions Eye Institute, Perth, Western Australia, Australia.|Royal Perth Hospital, Perth, Western Australia, Australia.
authors: Fred K
authors: FK
authors: Chen
authors: Ninewells Hospital, Dundee, UK.
authors: Kim L
authors: KL
authors: Ah-See
authors: Centre for Ophthalmology and Visual Science, The University of Western Australia, Perth, Western Australia, Australia.|Lions Eye Institute, Perth, Western Australia, Australia.|Royal Perth Hospital, Perth, Western Australia, Australia.
authors: Evan N
authors: http://orcid.org/0000-0002-5466-1176
authors: EN
authors: Wong
authors: Lions Eye Institute, Perth, Western Australia, Australia.
authors: Ivy
authors: I
authors: Tang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D003930:Diabetic Retinopathy / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D012189:Retrospective Studies; D014787:Vision Tests / Q000295:instrumentation*; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult