👉 A dioptograph is a device used for measuring and comparing the visual acuity of individuals, including children. It consists of two lenses that are positioned at different distances from the eye to allow for measurement of distance vision. The diopter (d) is the unit of measurement used in dioptographs, which measures how much light falls on the lens in each direction. This allows for comparison and analysis of visual acuity across different ages and populations.
