Usher Syndrome
A group of inherited conditions that affect both vision and hearing. It is the most common genetic cause of combined deafness and blindness, affecting the retina and the inner ear.
Understanding Usher Syndrome
People living with Usher Syndrome experience progressive vision loss caused by an inherited retinal disease, most commonly Retinitis Pigmentosa (RP), alongside congenital or progressive hearing loss.
The impact of Usher Syndrome varies depending on the type and genetic cause. Some people experience hearing loss from birth and develop vision changes later in life, while others experience progressive changes in both hearing and vision.
Advances in genetic research, retinal imaging, and emerging therapies are improving understanding of Usher Syndrome and creating new opportunities for diagnosis, support, and treatment.
Retina International works with people affected by Usher Syndrome, patient organisations, researchers, clinicians, and partners worldwide to advance research and ensure that lived experience informs the future of retinal health.
What is Usher Syndrome?
Usher Syndrome is a group of inherited retinal diseases characterised by progressive retinal degeneration and hearing loss.
The retina contains specialised cells called photoreceptors that detect light and allow us to see. In Usher Syndrome, genetic changes affect proteins that are important for the normal development and function of both retinal cells and inner ear structures involved in hearing and balance.
Over time, retinal degeneration can lead to progressive vision loss, often beginning with difficulty seeing in low light and loss of peripheral vision.
Usher Syndrome is classified into three main types:
Usher Syndrome Type 1
People with Type 1 typically have:
- Severe hearing loss or deafness from birth
- Balance difficulties caused by inner ear involvement
- Early-onset retinal degeneration
Usher Syndrome Type 2
People with Type 2 typically have:
- Moderate to severe hearing loss from birth
- Normal balance function
- Vision loss that usually develops later
Usher Syndrome Type 3
People with Type 3 typically have:
- Progressive hearing loss
- Variable onset and progression of retinal degeneration
- Possible balance difficulties
The severity and progression of symptoms can vary significantly, even among people with the same type of Usher Syndrome.
3 main types
Commonly classified into Types 1, 2 and 3, with different patterns of hearing, vision and balance involvement.
Autosomal recessive
Usually inherited when a person receives two disease-causing gene variants, one from each parent.
Vision + hearing
The most common genetic cause of combined deafness and blindness, affecting both the retina and inner ear.
How Usher Syndrome can affect vision and hearing
Vision-related symptoms
Because Usher Syndrome commonly involves retinal degeneration, people may experience:
Difficulty seeing in low light
Night blindness is often one of the earliest signs of retinal involvement.
Loss of peripheral vision
Progressive narrowing of the visual field may create tunnel vision.
Difficulty navigating environments
Reduced side vision can affect mobility, especially in unfamiliar surroundings.
Changes in central vision
Some individuals may experience reduced ability to read, recognise faces, or see fine details as the condition progresses.
Hearing-related symptoms
Hearing loss may include:
- Congenital deafness or hearing impairment
- Progressive loss of hearing over time
- Difficulty understanding speech, particularly in noisy environments
Some individuals also experience balance difficulties due to inner ear involvement.
Identifying Usher Syndrome
Hearing assessment
Audiological testing can identify the presence and extent of hearing loss.
Eye examination
An ophthalmologist may assess retinal changes associated with progressive retinal degeneration.
Retinal imaging
Technologies such as optical coherence tomography (OCT) and retinal photography can help evaluate retinal structure and monitor changes.
Visual field testing
This measures peripheral vision and helps track progression.
Electroretinography (ERG)
ERG measures retinal function and can support diagnosis.
Genetic testing
Genetic testing is essential for confirming Usher Syndrome and identifying the specific gene involved.
A genetic diagnosis can help:
- Confirm the type of Usher Syndrome
- Support family planning decisions
- Identify eligibility for clinical trials
- Guide future treatment approaches
Supporting vision, hearing, and independence
Hearing support
Depending on individual needs, support may include:
- Hearing aids
- Cochlear implants
- Communication support
- Sign language services
- Assistive listening technologies
Vision support
Low vision services can help people adapt to changes in sight through:
- Assistive technology
- Magnification tools
- Mobility training
- Environmental adaptations
Rehabilitation and support services
A multidisciplinary approach may involve:
- Ophthalmologists
- Audiologists
- Genetic counsellors
- Low vision specialists
- Rehabilitation professionals
Emerging treatments
Research is exploring approaches including:
- Gene therapy
- Gene editing
- Retinal cell therapies
- Other vision restoration technologies
Supporting communication, independence, and participation
Usher Syndrome can affect many aspects of daily life, including communication, education, employment, mobility, and social participation.
Many people living with Usher Syndrome develop strategies and use technology, accessibility tools, and community support to lead independent and fulfilling lives.
Support may include:
- Early access to hearing and vision services
- Accessible education
- Assistive technology
- Mobility and rehabilitation support
- Peer networks
- Patient organisations
- Research participation
The lived experiences of people with Usher Syndrome are essential in shaping healthcare, research priorities, and advocacy.
Advancing the future of Usher Syndrome treatment
Gene therapy
Gene therapy approaches aim to address the underlying genetic cause of disease by delivering functional copies of genes or modifying genetic changes.
Learn About Gene TherapyRetinal cell therapies
Researchers are investigating whether replacement or regeneration of retinal cells could restore visual function.
Learn About Retinal Cell TherapyGene editing
New technologies are being explored to correct genetic changes directly.
Learn About Gene EditingNatural history studies and registries
Long-term studies help researchers understand how RP progresses and identify meaningful outcomes for clinical trials.
Learn About Natural History StudiesClinical trials
People living with RP may have opportunities to participate in research studies investigating new treatments and technologies.
Learn About Clinical TrialsInformation and community support
Take the Next Step
The importance of combining scientific progress with lived experience is vital. Through collaboration between patients, families, researchers, clinicians, and organisations worldwide, progress continues towards better support, improved treatments, and new possibilities for people affected by Usher Syndrome.
