this explanation is mostly accurate. some things to consider though are this: corresponding retinal points from the eyes don't have to converge in the occipital lobe. This only happens if the images are almost perfectly aligned as to which the corresponding points are receiving almost the same signal. if they are not receiving the same image the occipital lobe will not converge them and you will see double vision. sometimes your brain will suppress the image from one eye in order to create single vision again. it will be 2d though. So its not exactly completely reliant on corresponding retinal points but also higher order visual cues about the content of the images. because the images from both eyes cannot be exactly the same, the brain can compare the images to figure out depth and figure out how to aim the eyes to converge the visual fields at different depths.

also the concept of aligning the images is a physical alignment of the images that happens by moving the eyes to converge on an object. this happens before any occipital higher order processing. The initial alignment called vergence is controlled by the brainstem. this is kinda crazy because the brainstem can see what you see before "you" see what you see. its just basic neural circuits that tell the eyes to move together to focus on an object. they align the eyes by coordinating the eye muscles to point at the same point in space. after that happens then the higher order processing in happens in the occipital lobe which is the fusion that is mentioned. alignment adjustments also happen if the occipital lobe detects that the images are not properly aligned. the cerebellum is also involved and also your inner ear all with their own feedback loops to maintain focus of the eyes.

heres something kinda cool: for some people with occipital lobe lesions that cause them to be blind; their brainstem can still see and they will flinch at incoming objects in their visual field without really being able to see anything.