专家表示,人到40岁就会有1 00度的老花眼,但眼睛有代偿功能,在光线好的条件下,仍能看清近物。等到四五十岁,老花眼度数加深,眼睛无法代偿,看近物时就会出现眼痛、疲劳、头痛等不适。老花度数随着年纪的增大而增加,一般从40岁开始,每增长5岁就增约1 00度。近视与老花不会相互抵消 Experts say that when they reach the age of 40, they will have 100 degrees of presbyopia, but their eyes have compensatory functions. Under good lighting conditions, they can still see the near objects. Wait until four or five years old, presbyopia deepened, the eyes can not be compensated, look near when there will be eye pain, fatigue, headache and other discomfort. The number of presbyopia increases with age, generally starting at age 40 and increasing by about 100 degrees for every 5-year increase. Myopia and presbyopia will not offset each other