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Usher's
Syndrome
When
retinitis pigmentosa (RP) is associated with hearing loss, it is
called Usher's Syndrome.
There
are two types of Usher's Syndrome.
Usher
Type 1: Early damage to the cochlea of the ear results
in deafness which starts from birth. The retinitis also starts early
with a progression from night blindness to tunnel vision within
the first 10 years of life.
Usher
Type 2: These patients are more fortunate. The loss of
hearing is less severe and the retinitis pigmentosa becomes more
evident during the child's late teens and twenties. Unlike most
patients with Ushers Type 1, Type 2 patients are more likely to
benefit from hearing aids and lip reading.
Important
Statistics |
| Up
to 6% of people born deaf have Usher's |
| Up
to 8 % of RP patients have Usher's |
|
Autosomal
recessive inheritance means you must have two of the recessive
genes to have the disease.
|
Diagnosis:
Hearing loss usually comes before night blindness and tunnel
vision of RP. If a child is slow to start speaking, it may also
have trouble hearing. All children with hearing problems should
have eye and ear examinations.
Treatment:
Though
there is no current treatment to stop the progression of Usher's
Syndrome, it is essential to recognize affected patients as early
as possible.
Early
intervention can help patients with hearing aids, sign
language and lip reading training. In general, more can be done
to help the patients when Usher's Syndrome is diagnosed before hearing
and sight are lost.
Genetic
testing and counseling can let patients and their parents
understand the probability that they will pass along this genetic
predisposition to their children.
About
Retinitis Pigmentosa
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