1) This study confirms that foveal hypoplasia in the so-called isolated form have a similar origin as in aniridia namely PAX6 mutation and that it is a symptom in all cases while the iris anomaly may be variable. 2) In contrast to this foveal hypoplasia in albinism may occur variably in a family while the asymmetry of VEP is a constant finding. 3) Therefore the VEP alone is helpful to differentiate clinically wether a foveal hypoplasia belongs to the albino or to the aniridia group.
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