"Presbyopia" is a common syndrome, it began to appear and the influence to the eyes of those over 40 years old. This is a syndrome of the process of human aging, it causes affecting human Visual function, then the reading of the text would be a difficult process. Besides the problem of color as well as age which, when it the distinction of the same color is very difficult sometimes can happen color blindness condition. Auditory function also not escape the aging
đang được dịch, vui lòng đợi..
