04- Resnikoff S, Pascolini D, Mariottia S, Pokharela G. Global magnitude of visual impairment caused by uncorrected refractive errors in 2004. Bull World Health Organ. 2008;86:63–70.

04- Resnikoff S, Pascolini D, Mariottia S, Pokharela G. Global magnitude of visual impairment caused by uncorrected refractive errors in 2004. Bull World Health Organ. 2008;86:63–70.