Letter to the editor: Prevalence of astigmatism among 99,515 children in different areas of Xi'an City, China Aleksandra Opala, Łukasz Kołodziejski, Iwona Grabska-Liberek

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