Quote Originally Posted by Solus Corvus View Post
But each offset image is just capturing a closer plane from each eye's cone of vision aiming at that object. I don't buy that as a cause. I'd say if anything it's more likely eye accommodation. Basically your brain thinks it should have to refocus when looking at a nearer or farther object, but it doesn't since they are all in focus on the same plane (the screen).
No, the stereoscopic illusion is that it eliminates the need for your eye to focus on the same object by presenting the offset images already. Therefore your brain doesn't think it needs to focus ... and then you develop lazy eye.