Absolutely necessary

There was a time when being 600,000 (years old) was considered old. However, nowadays, even people in their 70s are regarded as in their youth, and the era of living to 100 years has arrived. In the past, when people aged quickly and death was imminent, it was considered virtuous not to treat most illnesses and to accept death. However, in today's era, even common illnesses, such as presbyopia, are treated so that people can enjoy medical benefits while alive, which is believed to improve the quality of life.