| HP:0000007 | Autosomal recessive inheritance | "A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in homozygotes. In the context of medical genetics, autosomal recessive disorders manifest in homozygotes (with two copies of the mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele)." [HPO:curators] |
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| HP:0000365 | Hearing loss | |
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| HP:0000505 | Impaired vision | |
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| HP:0000510 | Retinitis pigmentosa | "Hereditary degeneration and atrophy of the retina." [HPO:curators] |
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| HP:0000512 | Abnormal electroretinogram | "Any abnormality of the electrical responses of various cell types in the retina as measured by electroretinography." [HPO:curators] |
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| HP:0000518 | Cataract | "A cataract is an opacity or clouding that develops in the crystalline `lens` (FMA:58241) of the eye or in its `capsule` (FMA:58881)." [HPO:probinson] |
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| HP:0000543 | Pale optic disks | |
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| HP:0000548 | Cone-rod dystrophy | |
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| HP:0000551 | Abnormal color vision | |
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| HP:0000563 | Keratoconus | "A cone-shaped deformity of the cornea." [HPO:curators] |
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| HP:0000613 | Photophobia | "Excessive sensitivity to light with the sensation of discomfort or pain in the eyes due to exposure to bright light." [HPO:curators] |
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| HP:0000639 | Nystagmus | "Rhythmic, involuntary oscillations of one or both eyes related to abnormality in fixation, conjugate gaze, or vestibular mechanisms." [HPO:curators] |
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| HP:0000662 | Night blindness | |
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| HP:0001133 | Constricted visual fields | |
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| HP:0001141 | Severe visual impairment | |
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| HP:0001249 | Mental retardation | |
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| HP:0001250 | Seizures | "Seizures are an intermittent `abnormality of the central nervous system` (FMA:HP:0002011) due to a sudden, excessive, disorderly discharge of cerebral neurons and characterized clinically by some combination of disturbance of sensation, loss of consciousness, impairment of psychic function, or convulsive movements." [HPO:probinson] |
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| HP:0001252 | Muscular hypotonia | "Muscular hypotonia is an abnormally low muscle tone (the amount of tension or resistance to movement in a muscle), often involving reduced muscle strength. Hypotonia is characterized by a diminished resistance to passive stretching." [HPO:curators] |
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| HP:0001263 | Developmental retardation | "A delay in the achievement of motor or mental milestones manifested prior to age 18 and generally associated with lifelong mental and/or physical impairments." [HPO:curators] |
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| HP:0002084 | Encephalocele | |
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| HP:0002269 | Neuronal migration disorder | |
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| HP:0004374 | Hemiplegia/hemiparesis | "Loss of strength in the arm, leg, and sometimes face on one side of the body. Hemiplegia refers to a severe or complete loss of strength, whereas hemiparesis refers to a relatively mild loss of strength." [HPO:curators] |
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| HP:0006817 | Cerebellar vermis aplasia/hypoplasia | "Absence or underdevelopment of the cerebellar vermis." [HPO:curators] |
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| HP:0007401 | Primary noninflammatory macular atrophy | |
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| HP:0007663 | Decreased central vision | |
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| HP:0007688 | Absent rod-and cone-mediated responses on ERG | |
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| HP:0007703 | Abnormal retinal pigmentation | |
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| HP:0007843 | Attenuation of retinal blood vessels | |
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| HP:0012043 | Pendular nystagmus | "Rhythmic, involuntary sinusoidal oscillations of one or both eyes. The waveform of pendular nystagmus may occur in any direction." [HPO:probinson] |
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| HP:0012795 | Abnormality of the optic disc | "A morphological abnormality of the optic disc, i.e., of the portion of the optic nerve clinically visible on fundoscopic examination." [HPO:probinson] |
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