E Chart

An E Chart, also known as a Tumbling E Chart, is an ophthalmological chart used to measure a patient's acuity for distant vision.

File:Medical Instrument Eye Visual acuity chart E chart.jpg

A standard illuminated E chart

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. It works on the same principle as Snellen's distant vision chart.

See also

• Visual acuity
• Landolt C

References

• Basak, Dr Samar K. Ophthalmology Oral and Practical (3rd edition) (ISBN 81-86793-66-6)de:Snellen-Haken