New Method for Measurement of Strabismic Angle using Corneal Reflex and Photograph

ABSTRACT

PURPOSE: We introduce a new method for measurement of strabismic angle using corneal reflex and photograph, and report its clinical results. MATERIAL AND METHOD: The subjects were 5 orthotropic persons, 3 patients with eso-deviation of 20 prism and 30prism respectively, and 5 patients with exo-deviation of 15 prism, 20 prism, 30 prism, and 40 prism, respectively. While subject fixates distant target, we place the illuminator 1m in front of the subject and take the pictures. We got the ratio of corneal diameter and distance between right-side limbus and corneal reflex, then the difference between right and left. RESULT: If strabismic angle is Y and the difference (%) between the deviation ratio of right and left is X, Y=1.67x14.03. CONCLUSION:This new method can be used in patients of poor compliance, patients with poor visual acuity and measurement of distant strabismic angle.