Gyrate Atrophy
A rare inherited retinal disease that causes progressive degeneration of the retina and choroid, the vascular layer of the eye that supplies nutrients to the retina.
Understanding Gyrate Atrophy
Gyrate Atrophy is a rare inherited retinal disease that causes progressive degeneration of the retina and choroid, the vascular layer of the eye that supplies nutrients to the retina.
The condition is characterised by areas of retinal degeneration that appear as sharply defined, scalloped or “gyrate” patterns around the edge of the retina. Over time, these areas expand, leading to progressive loss of peripheral vision and, in later stages, impairment of central vision.
Gyrate Atrophy is caused by changes in a single gene involved in the metabolism of the amino acid ornithine. This makes it an important condition for understanding the relationship between genetic changes, metabolism, and retinal health.
Although there is currently no cure, early diagnosis, monitoring, dietary management, and advances in research provide opportunities to preserve vision and improve care for people living with the condition.
Retina International works with people affected by Gyrate Atrophy, patient organisations, researchers, clinicians, and partners worldwide to advance understanding of inherited retinal diseases and support progress towards improved outcomes.
What is Gyrate Atrophy?
Gyrate Atrophy is an inherited retinal disease caused by progressive degeneration of the retina and choroid.
The retina contains photoreceptor cells that detect light and allow us to see. The choroid provides essential blood supply and nutrients that support retinal function.
In Gyrate Atrophy, areas of degeneration develop in the peripheral retina and gradually expand over time. This can lead to progressive loss of:
- Peripheral vision
- Night vision
- Visual field
- Eventually, central vision
The condition usually begins in childhood or adolescence, although symptoms and progression can vary between individuals.
Gyrate Atrophy is also known as:
- Ornithine aminotransferase deficiency
- Hyperornithinaemia with gyrate atrophy of the choroid and retina
The condition is associated with increased levels of ornithine, an amino acid found naturally in the body.
1 gene
Gyrate Atrophy is caused by mutations in the OAT gene, which affects the metabolism of the amino acid ornithine.
Autosomal recessive
A person typically inherits two altered copies of the OAT gene, one from each parent.
Childhood or adolescence
Symptoms often begin in childhood or adolescence, commonly with night blindness and progressive loss of peripheral vision.
How Gyrate Atrophy can affect vision
Night blindness
Difficulty seeing in low light is often one of the earliest signs of the condition.
Progressive loss of peripheral vision
Degeneration usually begins in the outer retina, causing gradual narrowing of the visual field.
Reduced visual field
As areas of retinal degeneration expand, people may experience tunnel vision.
Reduced central vision
In later stages, the macula may become affected, leading to difficulty with detailed tasks.v
Light sensitivity
Some individuals experience increased sensitivity to bright light.
Cataracts
Some people with Gyrate Atrophy develop cataracts at an earlier age.
Identifying Gyrate Atrophy
Eye examination
An ophthalmologist examines the retina and may identify characteristic areas of degeneration.
Visual field testing
Measures peripheral vision loss and tracks progression.
Retinal imaging
Technologies such as optical coherence tomography (OCT) and fundus photography allow clinicians to examine retinal structure.
Genetic testing
Testing for changes in the OAT gene can confirm diagnosis.
A confirmed diagnosis can help:
- Guide treatment approaches
- Support family counselling
- Identify clinical research opportunities
Supporting vision and managing disease progression
Dietary management
Because Gyrate Atrophy is associated with elevated ornithine levels, some individuals may benefit from dietary approaches designed to reduce ornithine levels.
Management may involve:
- Reducing dietary intake of certain amino acids
- Working with metabolic specialists and dietitians
- Monitoring nutritional health
Treatment decisions should always be made with healthcare professionals.
Vitamin supplementation
Some individuals may be advised to consider vitamin B6 (pyridoxine) supplementation if they have a responsive form of the condition.
Low vision support
Support may include:
- Visual aids
- Assistive technology
- Mobility training
- Vision rehabilitation
Emerging therapies
Research continues into approaches that may target:
- The underlying genetic cause
- Retinal degeneration pathways
- Metabolic mechanisms
Adapting to progressive vision changes
Living with Gyrate Atrophy often involves adapting to gradual changes in vision over time.
People affected may experience challenges with:
- Mobility
- Education
- Employment
- Independent living
- Daily activities
Support may include:
- Early access to low vision services
- Assistive technology
- Educational accommodations
- Workplace adaptations
- Patient communities
Because Gyrate Atrophy often begins early in life, access to appropriate support can help individuals develop strategies for independence and participation.
Families may also benefit from genetic counselling to understand inheritance patterns and future risks.
The experiences of people living with Gyrate Atrophy are important in shaping research priorities and improving patient-centred care.
Advancing the future of Gyrate Atrophy treatment
Gene therapy
Because Gyrate Atrophy is caused by changes in a single gene, researchers are exploring approaches that may address the underlying genetic cause.
Learn About Gene TherapyRetinal cell therapies
Researchers are investigating whether replacement or regeneration of retinal cells could restore visual function.
Learn About Retinal Cell TherapyRetinal imaging advances
Improved imaging technologies help researchers:
- Track disease progression
- Identify biomarkers
- Evaluate treatment responses
Natural history studies and registries
Long-term studies help define how Gyrate Atrophy progresses and support the development of clinical trials.
Learn About Natural History StudiesClinical trials
Research continues into potential therapies aimed at slowing retinal degeneration and preserving vision.
Learn About Clinical TrialsInformation and community support
Take the Next Step
Gyrate Atrophy demonstrates the importance of understanding the relationship between genetics, metabolism, and retinal health.
Through collaboration between people affected by the condition, researchers, clinicians, and organisations worldwide, progress continues towards earlier diagnosis, improved management, and future treatments for inherited retinal diseases.
