human
Is there any truth to the belief that you can tell how old a person is based on their eyes?
assistant
Yes, there is some truth to this. It’s called “epigenetics” and it has been studied extensively in recent years. Epigenetics refers to changes in gene activity that occur without alterations in DNA sequences, so they are not inherited from parents. These changes can be caused by environmental factors like diet or lifestyle, but also by age-related processes such as aging.