Juvenile Macular Degeneration (JMD)
A group of rare inherited retinal conditions that affect the macula, the central area of the retina responsible for detailed vision.
Understanding Juvenile Macular Degeneration
Juvenile Macular Degeneration (JMD) refers to a group of rare inherited retinal conditions that affect the macula, the central area of the retina responsible for detailed vision.
Unlike age-related macular degeneration (AMD), which typically develops later in life, juvenile macular degeneration begins during childhood, adolescence, or early adulthood. It can cause progressive changes in central vision, affecting activities such as reading, recognising faces, learning, and performing detailed tasks.
JMD is not a single disease but a group of conditions with different genetic causes, patterns of progression, and effects on vision. Some forms are associated with specific gene changes, while others may occur as part of broader inherited retinal disorders.
Common forms of juvenile macular degeneration include:
- Stargardt disease
- Best Vitelliform Macular Dystrophy (Best Disease)
- Juvenile forms of cone-rod dystrophy
- Other inherited macular dystrophies
Advances in genetic testing, retinal imaging, and therapeutic research are improving diagnosis, understanding, and opportunities for future treatments.
Retina International works with people affected by juvenile macular degeneration, patient organisations, researchers, clinicians, and partners worldwide to advance research and ensure that patient experiences help shape the future of retinal healthcare.
What is Juvenile Macular Degeneration?
Juvenile Macular Degeneration describes inherited conditions that primarily affect the macula.
The macula is the central part of the retina responsible for:
- Sharp central vision
- Reading
- Recognising faces
- Seeing fine details
- Colour perception
When the macula is damaged, people may experience difficulty with tasks requiring detailed vision.
Although the conditions grouped under JMD share similarities, each condition has different causes and characteristics.
Examples include:
Stargardt Disease
The most common inherited macular dystrophy, usually caused by changes in the ABCA4 gene. It often causes progressive loss of central vision during childhood or early adulthood.
Best Vitelliform Macular Dystrophy (Best Disease)
A condition caused by changes in the BEST1 gene, characterised by abnormal deposits in the macula.
Juvenile cone-rod dystrophies
Conditions affecting cone cells and rod cells, which may cause reduced central vision, colour vision problems, and increasing difficulty seeing in low light.
JMD conditions vary significantly between individuals. Some people experience slow progression, while others may develop more significant visual impairment over time.
Central vision
Primarily affects the macula, which is responsible for sharp central vision, reading, recognising faces, and seeing fine detail.
Multiple genes
Genetically diverse, with associated genes including ABCA4, BEST1, PRPH2, CNGA3 and CNGB3.
3 inheritance patterns
Can be inherited through autosomal recessive, autosomal dominant, or X-linked patterns.
How Juvenile Macular Degeneration can affect vision
Blurred or reduced central vision
People may find it increasingly difficult to see fine details.
Difficulty reading
Reading speed and ability may be affected, particularly in low contrast conditions.
Difficulty recognising faces
Loss of central vision can affect facial recognition.
Distorted vision
Straight lines may appear bent or wavy.
Reduced colour vision
Some conditions affect the ability to distinguish colours.
Light sensitivity
Some individuals experience discomfort in bright environments.
Difficulty adapting to changes in lighting
Transitioning between bright and dark environments may become challenging.
Identifying Juvenile Macular Degeneration
Eye examination
An ophthalmologist examines the retina and macula for characteristic changes.
Visual function testing
This may include:
- Visual acuity testing
- Visual field testing
- Colour vision testing
Optical coherence tomography (OCT)
OCT provides detailed images of retinal layers and helps identify structural changes.
Fundus photography
Retinal photographs document changes and progression.
Genetic testing
Genetic testing can identify disease-causing gene variants and may:
- Confirm diagnosis
- Guide prognosis
- Support family planning decisions
- Identify research opportunities
Fundus autofluorescence (FAF)
FAF imaging can highlight changes in retinal cells and identify areas of damage.
Supporting vision and maintaining independence
Education support
Children and young adults may benefit from:
- Accessible learning materials
- Classroom accommodations
- Specialist support services
Low vision support
Specialist services can provide tools, training, and strategies to help people adapt to changes in vision.
Lifestyle and eye care
People with JMD may be advised to:
- Attend regular eye examinations
- Protect eyes from excessive light exposure where appropriate
- Maintain general eye health
Emerging treatments
Research is exploring:
- Gene therapies
- Cell-based therapies
- Retinal implants
- Pharmacological approaches
- Treatments designed to protect retinal cells
Supporting people through vision changes
Receiving a diagnosis of juvenile macular degeneration can have a significant impact, particularly when it occurs during important stages of education, career development, and personal growth.
People living with JMD may benefit from:
- Early access to support services
- Peer networks
- Assistive technologies
- Educational support
- Career guidance
- Emotional and social support
A diagnosis does not define what a person can achieve. With appropriate support and access to information, many people living with JMD continue to pursue education, careers, relationships, and active lives.
The experiences of people living with juvenile macular degeneration are essential in shaping research priorities and improving healthcare approaches.
Advancing the future of Juvenile Macular Degeneration treatment
Gene therapy
Researchers are investigating ways to replace or correct faulty genes responsible for inherited macular conditions.
Learn About Gene TherapyRetinal cell therapies
Scientists are exploring whether replacement of damaged retinal cells could restore or preserve vision.
Learn About Retinal Cell TherapyAdvanced imaging
Improved retinal imaging allows researchers to:
- Understand disease progression
- Identify early changes
- Measure treatment effects
Natural history studies and registries
Long-term studies help researchers understand how JMD progresses and identify meaningful outcomes for clinical trials.
Learn About Natural History StudiesClinical trials
Clinical studies are evaluating emerging treatments and helping determine which approaches may benefit people living with inherited macular conditions.
Learn About Clinical TrialsInformation and community support
Take the Next Step
Juvenile macular degeneration highlights the importance of early diagnosis, genetic understanding, and continued innovation in inherited retinal disease research.
Through collaboration between patients, families, researchers, clinicians, and organisations worldwide, progress continues towards better support, improved treatments, and a future where more people affected by inherited vision conditions can maintain independence and quality of life.
