Do we need to have age limit on renewing drivers license here in U.S.?

Its true that reflexes of elderly people are not as alert compared to younger age. If you have observed that elderly car accident is rising this days. Here in Hawaii a lot of elderly car accident happen each year, some elderly drivers are hitting elderly pedestrians fatally, others hit cars and so on.
Today in our local news a 90 year old woman drive her car straight in a house bedroom, there is a teenager sleeping on that bedroom, the old woman said 'she thinks shes hitting the brake instead shes hitting the gas' both of them are in the hospital.
Last year my husband have a mild accident with a 96 years old man, good thing its not a busy crossing, husband is supposed to turn left, the other driver gave him way when his in the middle of the crossing he was hit by the car of the 96 years old driver and the old guy said 'if only I'm younger I'm sure can avoid it'. Thats why me and hubby are talking about this matter 'why they allow this old people to renew their license?, it will just put them to fatal accident!.