How does the eye know when the image is in focus? There is distance measuring device, only light entering the eye. No outer feedback to be sure that focus is in fact focus not something the eye think is focus.

Question

Thank you all for your respons and upvotes.

I can now see and focus on the answer of my question 🙂

In: 3993

Answer 1

When older you also don’t perceive images too close. You also get something that is new to me and it unfocuses things randomly (typ. 45 ish).

I think it’s something in your eye getting hard (more solid).

I just learned this. If anyone knows more about the two I’d love to know more. Sorry if it is off topic but there is so much to understand.