Question about Clear Flashes

[Aquila]

Recently I have lots of Clear Flashes, and in the morning I have a big one (which I measured and improve my vision from 20/70 to 20/60!) which lasts for about 20 minutes and then it fades away like all of those flashes.

So my question is how do I make them permanent? because its been like ten days since I had those non stop clear flashes but they always fade; so I am not able to improve any further...