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Types of Usher Syndrome
What Are the Different Types of Usher Syndrome?
There are three types of Usher syndrome:
- US type 1 (US1) - characteristics include:
- Profoundly deaf from birth
- Do not usually benefit from hearing aids
- Severe balance problems
- Vision problems begin by age 10
- Blindness eventually occurs
- US type 2 (US2) - characteristics include:
- Moderate to severe hearing problems
- Usually benefit from hearing aids
- Use speech to communicate
- Normal balance
- Retinitis pigmentosa begins in teenage years
- US type 3 (US3) - characteristics include:
- Born with normal hearing
- Hearing problems develop in teenage years
- Near normal balance
- Deafness by late adulthood
- Retinitis pigmentosa begins around puberty
- Blindness by mid-adulthood
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