HG Wells wrote a short story 'The Country of the Blind', it's really good and I'd recommend. In that story, the visitor with sight is misunderstood by the blind villagers who have adapted to being blind, and they perceive the seeing man as an aberration worthy of pity, certainly not someone who is king. The visitor's sight gives him no advantage and actually becomes a hinderance to integrating with the blind villagers.

The point of the story is that it's often better to blend with the group, even when the defining characteristic is one regarded as negative (in this example, being blind). If the whole village is populated by blind people, and they have successfully adapted to live without sight, then the visitor who can see is at a disadvantage because everyone and everything around him is made for blind people, not for people with sight. The man who can see is out of place and shunned by the blind villagers.