The effect of positive-lens addition and base-in prism on accommodation accuracy and near horizontal phoria in Chinese myopic children

摘要

The effect of positive-lens addition (0, +0.75, +1.50, +2.25, +3.00 D each eye) and base-in prism power (0, 1.5, 3 ?G each eye) on both near focusing errors and latent horizontal deviations was evaluated in 29 Chinese myopic children (age: 10.3 ?? 1.9 years, refractive error: -2.73 ?? 1.31 D). Accommodation response and phoria were measured by the Shin-Nippon auto-refractor (right eye) and Howell-Dwyer near phoria card at 33 cm with each of the 15 lens/prism combinations in random order. The initial accommodative error was -0.96 ?? 0.67 D (lag