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A rare genetic eye disease with characteristics of foveal hypoplasia, optic nerve misrouting with an increased number of axons decussating at the optic chiasm and innervating the contralateral cortex, and posterior embryotoxon or Axenfeld anomaly (indicating anterior segment dysgenesis), in the absence of albinism. Patients present congenital nystagmus, decreased visual acuity, refractive errors and occasionally strabismus. Microphthalmia and retinochoroidal coloboma may also be associated. There is the disease is caused by homozygous or compound heterozygous mutation in the SLC38A8 gene on chromosome 16q23.
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