Effect of high-energy visible light¿filtering spectacle lenses on high and low contrast distance visual acuity Nishanee Rampersad; Rekha Hansraj;

Quantification of visual acuity: ¿Counting fingers¿ and ¿Hand movement¿ with the Berkeley Rudimentary Vision Test Alba Herrero; Halima Berrada; Rafael I. Barraquer; Ralph Michael;

Prevalence of astigmatism among 99,515 children in different areas of Xi'an City, China Ye Zhang; Xiaokang He; Wei Dong; Zihao Wang; Chengfei Liu; Yanying Li; Zhaojiang Du;