Masoumeh Abbasi-Shavazi - Department of Health Education and Promotion, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Zainab Anbari-Nogyni - Department of Aging Health, School of Public Health, Shahid Sadoughi University of Medical Sciences,Yazd, Iran

According to a report by world health organization (WHO) in 2018, the population of the elderly over 60 years will double from 2015 to 2050, and will increase between12% to 22%. Also, in 2050, 80 % of the elderly will be from low and middle-income countries. Though population changes toward aging has begun from developed countries such as Japan, but in the middle of the 20th century, the elderly population of Iran has reached a notable level. WHO considered hearing loss, cataract and refractive errors, back and neck pain and osteoarthritis, chronic obstructive pulmonary disease, diabetes, depression and dementia as common public health problems of elderly population .It also noted environmental, social and physical conditions of individuals including homes, neighborhoods, and communities as factors of healthy aging due to their significant influence on the development and maintenance of health behaviors  

Aging, challenges, Elderly Health journal