E Chart

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An E Chart is an ophthalmological chart used to measure a patient's acuity for distant vision.

A standard illuminated E chart

[edit] Uses

This chart is useful for patients that are illiterate or too young to read but who can speak.

It contains rows of the letter "E" in various kinds of rotation. The patient is asked to state where the limbs of the E are pointing "up, down, left or right." Depending on how far the patient can read his or her visual acuity is quantified. In principle it is just the same as Snellen's distant vision chart.