Clear Flashes

[AlkalineWater7]

I've been doing the bates method for some time now. I've noticed some clear flashes . The clearest it ever got was around 20/25, which is a far cry from the vision i have now. Why does blinking make the clear flash go away? What do i do at school when i need to see the board, when my eyes are strained and clear flashes aren't there to aid my vision? Sometimes, the teachers go at a fast pace, and erases the board while i'm trying to make out some of the words. I don't wear weaker glasses and don't want to either. Relaxing at school is kind of hard since the environment is stressful and effort is demanded.

[Aethersky]

there are several ways where you can aritificially generate very clear vision such as
-blinking forcibly (temporarily shortening the eye/cornea)
-producing tears
-the pupils shrinking when you are in a sunny day (you might notice your vision is much better in sunlight compared to cloudy)

are the clear flashes you are experiencing "legitimate"? if it is, then that is a good sign of progress, but don't get confused with artificial clear flashes.

i don't know your vision, but if you are having trouble seeing the board, wearing a weak -0.25D or -0.5D is a good idea and will not make your vision worse