reaganry check this out
https://youtu.be/wAakgY2fdbEI bought his books of exercises but I left them overseas :-(
I will see later / on the weekend if there are other videos on youtube.
I have only a very minor astigmatism on the left eye and I do not wear spectacles. However, there were about 20 people with me at the training and some had really thick-thick glasses and poor sight. Sessions were on Saturday and Sunday. Well, I can tell you that, as Leo anticipated on Saturday morning, some guys had to go to the next drugstore to buy lower grade glasses on the same day because they could not tolerate theirs anymore. This was after a few exercises. I am a scientist and a quite skeptic person. I need to see and measure to believe. Unless everyone was faking, that showed me that muscles around eyes are fundamental. Since 2010 apart from a short break I have been only using laptops. I am in an unpleasant position the whole day and my eyes are always focusing on a little display a few cm from me. The exercises do not eliminate the cause of my eyestrain but certainly produce relief. Now, to be honest I have not been doing them for long cause I am a bit depressed at not finding a way out with all these electronics, but I want to restart. I wonder whether we can sort of train ourselves to tolerate flicker, dithering or whatever it is that bothers us...