It is a heterogeneous condition defined loosely by any combination of optic nerve hypoplasia, pituitary hypoplasia, and midline neuroradiological malformations.

它是一种异质性条件界定的任何视神经发育不全，垂体发育不良，畸形和中线影像学结合松散。

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The boy, called Harvey, was born with a condition called optic nerve hypoplasia.

BBC: Jordan's two-year-old son Harvey (centre) was born blind