Petchara Ratanachan และ Prathurng Hongsranagon. (2010) Efficiency in visual function and quality of life of pre and post of cataract surgery patients in Roi Et Hospital, Roi Et province, Thailand. Chulalongkorn University:ม.ป.ท.Petchara Ratanachan และ Prathurng Hongsranagon. 2010. Efficiency in visual function and quality of life of pre and post of cataract surgery patients in Roi Et Hospital, Roi Et province, Thailand. ม.ป.ท.:Chulalongkorn University;Petchara Ratanachan และ Prathurng Hongsranagon. Efficiency in visual function and quality of life of pre and post of cataract surgery patients in Roi Et Hospital, Roi Et province, Thailand. ม.ป.ท.:Chulalongkorn University, 2010. Print.