The Snellen Eye Chart & 20/20 Vision - Looking Glass Optical

You may have seen the familiar chart in your doctor's office. Here’s a look at the history of the Snellen Eye Chart and how it's used to test your eyesight.

10 and 20 FT (3 and 6 M) Snellen Chart – Good-Lite Co

20/20 Vision: How to convert 20/20 based measure to Diopters

Difference between US, UK, and Korean vision scoring - B&VIIT Blog

Eye Charts

The Eye Chart, Explained

Generic Snellen Eye Chart Eye Charts for Eye Exams 20 Feet with Wooden Frame 11x22 Inches Canvas Low Vision Eye Test Wall Chart with Eye Occluder Hand

Visual Acuity Test Eduardo Besser, MD

A complete explanation of 20/20 or 6/6 normal vision?

What Does “20/20 Vision” Actually Mean? - Swagel Wootton Eye Institute