I have been using computers for long periods daily for the last 20 years. It's only been in the last few years that I've noticed a real difference. I've found t

I have been using computers for long periods daily for the last 20 years. It's only been in the last few years that I've noticed a real difference. I've found that the problem has been caused by staring at a small iphone screen. Reading tiny text for a while then switching back to looking around is really difficult. I've stopped using my phone for extended browsing and have noticed a reduction in eye strain.