File:ETDRS Chart R.svg

Size of this PNG preview of this SVG file: 631 × 599 pixels. Other resolution: 2,157 × 2,048 pixels.

Original file (SVG file, nominally 2,400 × 2,279 pixels, file size: 389 KB)

Summary[edit]

Summary
Description	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).
Source	Wikimedia Commons
Author	Fvasconcellos (talk · contribs)
Permission	See Commons

Public Domain

This file is in the public domain and may be used without restriction.

Please see the linked source page for the original file history, attribution information, and licensing details.

Original attribution and file history: Wikimedia Commons

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	01:20, 2 June 2026		2,400 × 2,279 (389 KB)	Maintenance script (talk \| contribs)	== Summary == Importing file

You cannot overwrite this file.

The following 2 pages use this file:

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Width	635mm
Height	603mm