Right eye for myself also with extreme spatial visualization skills. I think it is some compensation and some hijacking of brain functionality. Binocular vision takes a huge amount of brain resources dedicated to developing instinctual tracking, response to trajectory, estimating speed, etc. Without that demand the brain seems to let over that facility to conscious manipulation.
One of the pulls to my majoring in cognitive psychology was curiosity about the odd juxtaposition between an extreme internal ability matched to an external disability. Anecdotes here have presented many other variations than stereo-blindness that emphasize the same sort of mechanic in play.
