I dont have exact source, but common myth is staring at one point while you are coding, your eyes focus will be adopted to the distance between you and your mon

I dont have exact source, but common myth is staring at one point while you are coding, your eyes focus will be adopted to the distance between you and your monitor, muscles inside the eyes will be adopted to less frequent movement and this will cause dropping eyesight. whole body functions in this manner, if you train your muscles they will get bigger, otherwise they will stay as it is and after while you will not be able to muscle power for 100% thats why people are training their brain, muscles and etc,.