New Strategy of Visual Acuity Assessment by Consecutively-sized Landolt Ring Symbol.

In this paper, novel visual acuity test strategy is proposed. Unlike conventional way, an instructor shows a subject the magnifying image of Landolt ring through the monitor. By adapting multiple reliability verification system using feedback, instructor can get the vision acuity data with higher accuracy and resolution. It can detect at least 5 more distributed vision between representative vision widely known before. As the new system require less than half of the space than before, it is not only more accurate but also efficient.