If you want to stop it without using any medication, the best way to do it is by drinking warm herbal liquid like the mixture of warm tea and a little bit of honey or the mixture of warm water with a little bit of salt
If you want to stop it using medication, it's probably best to use the one that contained pepto-bismol or simethicone
B. astigmatism is the best answer, it definitely gives distorted images.
Nearsightedness is where you can't see things clearly unless they are really close up to the eyes. Farsightedness is where you can see things better the farther off, but both of those may still leave you seeing blurry. Sclera is just part of they eyeball, the outer white layer.