Don't need any studies for that. Some people's eyes are getting hurt or tired after some time and others not... it depends on the person. You can do the test yourself, just play(or work) on a computer screen for 12 hours starting at 10am till 10pm and you'll see for yourself. If your eyes hurts or getting tired then your affected by this problem.
One solution to this on the computer is to use the program called FL.UX which is free and it modifies your computer's display to adapt to the time of day, warm at night and like sunlight during the day.
So reading a boook on a PC wont be a problem for me but using anything than that could be a problem as I know lots of people with this kind of problem. For me, i don't have any problems with that. i could stare at a screen for more than 12 hours straigh and my eyes wont be tired, stressed or anything like that. I recently had my eyes checked and they're in full heath as well
Its amazing how can pain and suffering can make you do or think when someone very close that you love is going through. I can understand is point of view and anger towards anyone (gov,doctors and anyone else) wont allow assisted suicide. To see your father that you supported all your life in pain all day and probably all night long can be very hard to see for his son.
Can you imagine where a father, a supporter of a family, the pillar of a group, a leader once a man...reduced to almost nothing near the end of his life. Can you imagine your son taking care of you of small simple things as..."can you wash me in my bath tub son"... I'm sorry but for me, I can't imagine that since I do have my dignity and I don't want to lose that later in my life.
I can easily imagine his anger as he see's his father losing his life very slowly and leaving him in a painful way. But it's almost ironic to see doctors who are suppose to cure and heal people that in this case... are supporting suffering of a patient. it's just odd to see assisted suicide left alone in it's corner, unattended and unsupervised
The bright side of this is every major country have this problem so he's not alone at least. Hell, theres some articles on this subject almost every year involving these cases.
I'm not sure how it goes in other countries but it should be the same especially from the youtube movie called earth but the way industrialized countries raise they're livestock is really alarming. For example, here in Québec (east of canada for those who don't know where exactly) pigs are in big warehouses where they're usually born and raised but because there's so much of them in 1 space because of today's needs, they give them antibiotic. Of course, they're system removes most of the antibiotic after time but theres a small percentage that they keep and when they get killed so they sell there meat for us to eat, we get those antibiotics because they can't be removed 100%
So who's to blame here... if there is one to blame. I honestly believe society as a whole is to blame since they want meat. Companies gives them what they want because they want to make profit. On the other hand, people want meat as well so its an endless loop. If this continues at this rate.. Time for me to change my diet lmao
Computer programs expand so as to fill the core available.