Measuring Vision Accuracy

It’s common to hear “20/20 vision” when describing good eyesight, but you may not know what the term means.

20/20 vision is a measure of one’s visual acuity and indicates how clearly we see objects on an eye chart at 20 feet. The eye chart contains images, usually letters or pictures, of a very specific size gradually getting smaller near the bottom of the page.

Wikipedia Visual Acuity

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