An individual can lose their sight and hearing ability without any direct damage to their eyes or ears due to the condition known as Usher syndrome, which is a genetic disease.
• Usher syndrome is the most common syndrome that influences both vision and hearing.
• The prime signs of the syndrome are hearing loss or deafness and an eye disease called RP or retinitis pigmentosa.
• In Usher syndrome, hearing loss can take place due to the unusual growth of hair cells within the inner ear.
• The RP at the beginning results in night blindness and a loss of side vision due to the progressive degeneration of retina cells.
• With the advancement in RP, the field of vision becomes more narrow till the central vision remains, the condition is termed tunnel vision.
Thus, it is the Usher syndrome, which can lead to loss of sight or hearing, however, does not cause direct damage to the ears and eyes.
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