Image: Snellen chart

Size of this PNG preview of this SVG file: 481 × 599 pixels. Other resolution: 192 × 240 pixels.

Original image ‎(SVG file, nominally 1,303 × 1,624 pixels, file size: 112 KB)

Description: A typical Snellen chart. Originally developed by Dutch ophthalmologist Herman Snellen in 1862, to estimate visual acuity. When printed out at this size, the E on line one will be 88.7 mm (3.5 inches) tall and when viewed at a distance of 20 ft (= 609.6 centimeters, or 6.09600 meters), you can estimate your eyesight based on the smallest line you can read.
Title: Snellen chart
Credit: Own work by uploader, Based on the public domain document: [1]
Author: Jeff Dahl
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes

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