my vision sometimes goes double. It’s mostly when I’m reading up close- if I look at something far away it doesn’t happen. I can ‘make’ myself do it- if I look at something too hard/in a certain way(im not exactly sure how) I can easily make it split into 2. And I can focus and look at the fake/double image. But sometimes it happens accidentally, like if I’m reading and haven’t actually made it go double but my vision goes double anyway. My eyes are fine/no squint and I don’t need glasses and I know everyone can probably induce double vision on themselves, but I just wondered if anyone knew anything more about this and how to stop it happening accidentally. It’s getting annoying now- it doesn’t happen all the time but it’s very frequent where i’ll look at something up close or I’ll read something and my eyes slip into double vision. Thank you in advance 