I am happy for further references, that give explanations on the background, why the camera optics in this case is as it is. (Unfortunately my search in the web was not that successful on it, but I might have searched for the wrong terms/words as I don't have a deeper background in optics.)
Thanks @Ibix for your answers.
> You can tell which way up it is at a glance. Otherwise it's difficult to tell a left eye retina from an upside down right eye retina.
But are ophthalmological devices, ever used in an upside down way, such that such an indication would be necessary? I also...
Hi,
I currently have to do with fundus images ( https://en.wikipedia.org/wiki/Fundus_photography ). I am wondering, if someone has an idea, what the meaning of the rectangle on the sphere means? (marked in the following in green) At this images it looks like a rectangle, I also saw some fundus...