Every Eye Doctor and Optometrist in the UAE, Saudi Arabia, Qatar and the other GCC countries has a Snellen Chart. Even in USA and UK, it is still one of the most popular tools in any ophtalmologic instrument collection.

The Snellen Chart was developed in 1861 and and determins the visual acuity of a patient.

Depending on the ability to recognize letters at a norm distance of 20 feet (6 Meters), the Eye Doctor can diagnose the quality of vision of a patient.