Functional scoring of the field of binocular single vision in patients with diplopia.

A simple method for scoring the field of binocular single vision (BSV) is presented. The field is plotted on the Goldmann Perimeter using the III-4e target. The method gives greater weight to functionally important areas, especially the primary and reading positions. Several cases illustrate the application of the proposed scoring system by correlating patients' subjective disabilities with their diplopia scores. The method is more precise than any previous scheme and provides a quantitative measure that makes the examination of patients with diplopia more accessible to legal evaluation and numerical analysis.