[cgufus]

Interesting article and discussion.

I always wondered how the focusing actually works. It happens „automatically“, but what is involved? Are all cone types used for the focusing, or mostly the green-type ones? Or are there even special, dedicated cells for the focusing only? Does the control ober the muscle controlling the lens shape goes via the brain, or is there a more direct mechanism?

Is there an expert around to explain or give some links to explanations?

(as a side comment: as a teenager I learned to control the focus point to a certain degree. There were these pattern-3D images, „Magic Eye“, and since the perceived depth does not correspond to the actual distance of the image, they eye needs to correct. I guess the same applies to 3D cinema, and may well cause the eye strain reported by many)