NDP and exudative vitreoretinopathy 2, X-linked: Expression in ocular tissue, the trabecular meshwork in particular, implicates both genes as plausible functional candidates, although the known relationship of NDP with eye development (mutations cause Norrie disease and familial exudative vitreoretinopathy 2 [FEVR2]),48 suggest NDP could be the more likely functional candidate.