From my obversations and discussing landings with pilots it is my beliefe that nose wheel landings result from the pilot being trained to look at the far end of the runway.
In most light aircraft such as Cessnas if you raise the nose to the proper touchdown attitude the end of the runway will disappear due to the nose blocking it.
Therefore a great number of the nose wheel landers have never been taught correct height judgement above the landing surface.
Look along side the nose to judge height as the nose rises and blocks the foward view would be a good start.