I agree with you. I personally know a lot of cases where people’s eyesight has deteriorated due to gadgets, improper lighting at work, etc. But still most of our eye problems are due to genetics. If you are interested to know more about this or maybe you have some eye problems that you would like to diagnose correctly, then you should check out this page https://myvisioncare.org/blog/ocular-demodicosis . There is a lot of useful information to help you keep your eyes healthy.