Tratak
Active focus based meditation
If you've been trying to improve your vision you must have heard about Tratak its a flame gazing techinique which is usually done on flame like diya or a candle=
Better Try Out Yourself
Tratak being quite a controversial topic , you cant tell that if it is right for you doing it
some of them state that tratak can quite reduce myopia
some of them say that it should not be done if you have high myopia
some of them say it should not be done with weak eyes
it works different for different peoples if you have complicated vision issues i wont suggest you doing it much ...
try out yourself see if you observe anything bad with your eyes , if yes then stop doing it if no and it gets more clear then yeah you can do it .... it might start double vision but aey thats okay double vision i belive is natural sign of improvement so that shouldnt be an issue