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    English: ETDRS Chart R, one of the three logMAR chart models designed by Ferris, Kassoff, Bresnick, and Bailey for use in the Early Treatment Diabetic Retinopathy Study (ETDRS).
    • Chart and optotype dimensions in millimeters precisely as specified by Ferris et al. (1982).
    • LogMAR and VAR values after Baliey & Lovie (2013).
    • Note: meters/feet not a direct conversion, but rather in Snellen equivalents (1 meter = 5 feet).
    Español: Test R de ETDRS, uno de tres modelos de prueba logMAR diseñados por Ferris, Kassoff, Bresnick y Bailey para su utilización en el estudio de tratamiento temprano de la retinopatía diabética, o ETDRS por sus siglas en inglés.
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    Author Fvasconcellos (talk · contribs)
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    Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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    Other versions File:ETDRS Chart 1.svg, File:ETDRS Chart 2.svg
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    Date/TimeThumbnailDimensionsUserComment
    current23:32, 10 January 2021Thumbnail for version as of 23:32, 10 January 20212,250 × 2,137 (389 KB)Fvasconcellos{{Information |Description=ETDRS Chart R, one of the three {{w|logMAR chart}} models designed by Ferris, Kassoff, Bresnick, and Bailey for use in the Early Treatment Diabetic Retinopathy Study (ETDRS). *Chart and optotype dimensions in millimeters precisely as specified by Ferris et al. (1982). *LogMAR and VAR values after Baliey & Lovie (2013). *Note: meters/feet not a direct conversion, but rather in Snellen equivalents (1 meter = 5 feet). |Source=Own work, after *{{cite journal|authors=Fer...

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