I experience distant vision a few times a month. It occurs most frequently after strenuous activities but happens other times as well (while writing, studying, laying in bed, on the computer, etc.). I used to get it more frequently when I was very young. Everything will look far away but still very clear. It makes it difficult to estimate distances while walking or reaching for things. It usually will go away in about 15-30 minutes. What can cause this? It doesn't seem to be an issue with my eyes but more of a mental thing.
I have searched about this online and only found one post from someone else experiencing the same thing but no answers.