Multicenter Questionnaire Survey Regarding Clinical Visual Acuity Chart

Abstract

We conducted a multicenter questionnaire survey regarding clinical visual acuity charts, to grasp and analyze the current situation and consider proposing a new standard visual acuity chart. The survey response rate was 43.6%. The problems to be solved were variation of evaluation criteria and method by visual acuity chart type, lack of maintenance regarding visual acuity chart luminance and illuminance, discrepancies between examiners in visual acuity measurement, induced errors of visual acuity and subjective refraction, and statistical biases. This study revealed the current problems and points of improvement regarding use of the clinical visual acuity chart.