In the dictionary old age is defined as the last period of human life, how often considered to be the years after 65. To me old age can to define in many ways. It can be a specified age in your culture that says you are old age or it can be a number you give yourself to say your old age. To many people age is just a number. Many are still carefree about aging. Aging become an issue when your body starts to show signs of age. I think this happens more to women than men because more women want to stay looking younger and think the signs of aging looks bad. I take aging as you are getting smart and have been thought more.
As for who decides what number old age is, I think the government. The reason for this because they put an age restriction on when you can withdraw your money or when you can get your Medicare. So when people have to use sources like Medicare think I am too old to do anything and happiness starts to decrease. To me the only person judge if you are old age is yourself. It is what you make of it. Once you reach the age of 65 (the number the government declares as old age) this should be your golden age. This should be the age where you teach ones under you what you learn. You should take