Total 33 clinical symptoms reported for Usher syndrome  Very Frequent (10)Occasional (18)Frequent (5)

Abnormal electroretinogram	Any abnormality of the electrical responses of various cell types in the retina as measured by electroretinography.   Synonyms:Abnormal electroretinography; Abnormal ERG; ERG abnormal	Very frequent
Abnormality of retinal pigmentation	Synonyms:Abnormal retinal pigmentation; Abnormality of retinal pigment epithelium; Abnormality of RPE; Retinal pigmentary anomaly	Very frequent
Blindness	Blindness is the condition of lacking visual perception defined as visual perception below 3/60 and/or a visual field of no greater than 10 degrees in radius around central fixation.   Synonyms:Blindness; Total vision loss	Very frequent
Nyctalopia	Inability to see well at night or in poor light.   Synonyms:Night blindness; Night-blindness; Poor night vision	Very frequent
Progressive visual loss	A reduction of previously attained ability to see.   Synonyms:Loss of visual acuity; Progressive loss of vision; Progressive vision loss; Progressive visual acuity loss; Progressive visual impairment; Slowly progressive visual loss; Vision loss, progressive; Visual loss, progressive	Very frequent
Sensorineural hearing impairment	A type of hearing impairment in one or both ears related to an abnormal functionality of the cochlear nerve.   Synonyms:Hearing loss, sensorineural; Sensorineural deafness; Sensorineural hearing loss	Very frequent
Vestibular areflexia	Vestibular areflexia can be measured as the absence of the caloric nystagmus response in electronystagmography.	Very frequent
Vestibular dysfunction	An abnormality of the functioning of the vestibular apparatus.   Synonyms:Impaired vestibular function; Interictal vestibular dysfunction; Vestibular function defect	Very frequent
Visual field defect	Synonyms:Partial loss of field of vision; Visual field defects	Very frequent
Visual impairment	Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery.   Synonyms:Impaired vision; Loss of eyesight; Poor vision; Visual impairment	Very frequent