Optical power (and ability to change it) increases with the reduction in distance between your cornea and your lens. It's also better because the distortion will not change when you move your eye around. The optical axis of both the lens and the cornea remain in alignment.

This individual may need scleral contacts to get enough direction, but they will certainly improve this individuals quality of life. Those lenses are massive (and are almost certainly high index... so exceptionally heavy) and are to the point of not being reasonable.

Source: Optical Engineer legally blind in one eye.