Chronic muscle tension, and associated mental anxiety, is the cause of many health problems. There is a reason that so many people have found value in addressing such problems with things like massage, meditation and other therapies.

Close work is a normal part of seeing. Anything done to extreme excess will be hard to ignore, but there is no reason that someone who does computer work or paperwork all day can’t improve their vision, provided they take breaks to relax and recharge, and apply the principles of good vision. Likewise not everyone who does a lot of close work develops myopia. Worse vision after prolonged close work can be partially due to the short distance itself, but also the way the eyes are used. It’s similar to how one person moving heavy boxes can finish the job without a back ache because he knows how to use his body, while the other suffers back pain and blames the boxes for his long-standing misuse of his body.

Many of the ideas here are simply erroneous. Muscle tension is not necessarily bad for you (without it, your muscles will just atrophy). Perhaps you don’t like the prescriptions the same way you dislike anything unnatural, but the exaggeration on the associated side effects are blown out of proportion.

Here is one thing you can try to disprove your theory: read every day for 8 hours, at 30cm, while trying to conscious apply your method – it would be sufficiently surprising if your myopia doesn’t get worse.