A chart that is read from a fixed distance; used as measure visual acuity. they are just one part of a complete eye exam.
Vision tests check many different functions of the eye. The tests measure your ability to see details at near and far distances, check for gaps or defects in your field of vision, and evaluate your ability to see different colors.
Custom your eye chart: http://www.eyechartmaker.com/
Downloadable Snellen Chart by this link (need register)
Simple Online Near Vision Testing