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Diseases » Usher Syndrome » Glossary

Glossary for Usher Syndrome

Autosomal Genetic Diseases: Any conditions that are related to any non-sex-determining chromosome
Autosomal Recessive Genetic Diseases: Any conditions that are related to any non-sex-determining chromosome
Blindness: The inability to see out of the eyes
Carrier conditions: A condition where a person is symptom-free despite a genetic or infectious disease
Deafness: Inability to hear sounds.
Dizziness: Feelings of lightheadedness or giddiness.
Ear conditions: Any condition that affects the ear
Eye conditions: Any condition that affects the eyes
Genetic Disease: Any disease that is handed down to oneself through the chromosomes of ones parents
Hearing impairment: Reduced ability to hear sounds.
Night blindness: Poor vision in darkness or dim light
Nystagmus: Involuntary jerky eye movements
Peripheral vision loss: Reduced or lost peripheral vision
Recessive Genetic Diseases: A disease that produces an effect in humans only when it is homozygous
Retina Conditions: Any condition that affects the retina of the eye
Retina symptoms: Symptoms affecting the retina in the back of the eye
Retinitis Pigmentosa: Retinitis pigmentosa is a group of inherited disorders characterized by progressive peripheral vision loss and night vision difficulties that can lead to central vision loss.
Retinitis pigmentosa: Retinitis pigmentosa is a group of inherited disorders characterized by progressive peripheral vision loss and night vision difficulties that can lead to central vision loss.
Sensorineural deafness: A condition which is characterized by deafness due to a sensineural deficit
Sensorineural hearing loss: Hearing loss due to abnormal functioning or damage to the hearing nerve or the cochlea (inner ear) or the part of the brain that processes sound. The hearing problem may be present at birth or may be acquired through such things as aging, excessive noise or diseases such as meningitis.
Usher Syndrome Type 1: A rare inherited disorder characterized by sensorineural deafness at birth or soon after and progressive vision loss which starts during the first decade of life and blindness usually occurs between 20-35 years of age. Symptoms are generally more severe than in type 2 with deafness occurring at birth or during first year and vision loss starting during childhood.
Usher Syndrome Type 2: A rare inherited disorder characterized by mild to moderate sensorineural deafness at birth and progressive vision loss which starts in late adolescence or early adulthood and blindness occurs after about 35 years of age. Symptoms are generally not as severe as in type I with deafness occurring from birth and vision loss starts during adolescence or later .
Usher Syndrome Type 3: A rare inherited disorder where children are born with normal hearing and vision which progressively deteriorates at a variable rate.
Vision loss: Impaired vision or loss of vision