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

Influence of different types of astigmatism on visual acuity Laura Remón, Juan A. Monsoriu, Walter D. Furlan

The profile of astigmatism in 6–12-year-old children in Iran Hassan Hashemi, Amir Asharlous, Mehdi Khabazkhoob, Abbasali Yekta, Mohammad Hassan Emamian, Akbar Fotouhi